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Stock-Based Compensation - Additional Information (Detail) (USD $)
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12 Months Ended |
6 Months Ended |
7 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Jun. 10, 2014
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Dec. 31, 2014
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Jun. 17, 2010
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
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| Sale of stock, number of shares issued in transaction |
0 |
779 |
0 |
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|
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| Maximum [Member] | 2014 Omnibus Incentive Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Number of shares authorized |
4,500,000 |
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|
|
4,500,000 |
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| Time-based Restricted Stock Awards [Member] |
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|
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Restricted Stock Units granted during period |
0 |
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|
|
|
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| Repurchase of vested stock awards, shares |
0 |
3,372 |
0 |
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|
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| Repurchase of vested stock awards, value |
0 |
900,000 |
0 |
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|
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| Compensation expense |
7,000,000 |
8,300,000 |
4,200,000 |
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|
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| Adjustment of prior period grant date fair value |
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|
2,500,000 |
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|
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| Unrecognized compensation cost |
4,900,000 |
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|
|
4,900,000 |
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| Weighted-average period of recognition |
2 years 6 months |
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| Time-based Restricted Stock Awards [Member] | Minimum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
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| Stock awards, vesting period |
3 years |
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| Time-based Restricted Stock Awards [Member] | Minimum [Member] | Cliff Vesting [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
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| Stock awards, vesting period |
1 year |
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| Vesting percentage |
20.00% |
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| Time-based Restricted Stock Awards [Member] | Maximum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock awards, vesting period |
5 years |
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| Time-based Restricted Stock Awards [Member] | Maximum [Member] | Cliff Vesting [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
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| Stock awards, vesting period |
2 years |
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|
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| Vesting percentage |
40.00% |
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| Time-based, Performance-based and Modified Time-based Restricted Stock Awards [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Grants in period |
0 |
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| Liability Awards [Member] |
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Stock awards, vesting period |
2 years |
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|
|
|
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| Compensation expense |
0 |
|
900,000 |
|
|
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| Liability Awards [Member] | Maximum [Member] |
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|
|
|
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Compensation expense |
|
100,000 |
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|
|
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| Unrecognized compensation cost |
|
0 |
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|
|
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| Management Retention Awards [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Compensation expense |
900,000 |
1,400,000 |
2,300,000 |
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| Unrecognized compensation cost |
400,000 |
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|
|
400,000 |
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| Weighted-average period of recognition |
1 year 1 month 6 days |
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| Management Retention Awards [Member] | Minimum [Member] |
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Stock awards, vesting period |
1 year |
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| Management Retention Awards [Member] | Maximum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
|
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| Stock awards, vesting period |
4 years |
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| Restricted Stock Sales [Member] |
|
|
|
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
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| Compensation expense |
|
200,000 |
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| Time-based and Performance-based Restricted Stock [Member] |
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of shares authorized |
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|
750,000 |
| Restricted Stock Units granted during period |
0 |
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| Modified Time-based Restricted Stock Awards [Member] |
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
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| Restricted Stock Units granted during period |
0 |
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|
0 |
0 |
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| Compensation expense |
2,500,000 |
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|
|
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| Unrecognized compensation cost |
9,300,000 |
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|
9,300,000 |
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| Weighted-average period of recognition |
2 years 7 months 6 days |
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| Restricted Stock Units [Member] | 2014 Omnibus Incentive Plan [Member] |
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|
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of directors, to whom shares issued |
2 |
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| Restricted Stock Units [Member] | 2014 Omnibus Incentive Plan [Member] | Director [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Restricted Stock Units granted during period |
4,736 |
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|
|
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| Compensation expense |
100,000 |
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| Shares granted to directors, grant date fair value |
100,000 |
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$ 100,000 |
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