Deferred compensation (2010 Equity Incentive Plan) (Detail) - Predecessor - USD ($)
$ / shares in Units, $ in Thousands |
|
3 Months Ended |
12 Months Ended |
Oct. 01, 2014 |
Mar. 21, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Vest date fair value |
|
|
|
|
|
|
| Aggregate intrinsic value of unvested Time Vested restricted shares outstanding |
|
|
$ 0
|
|
|
|
| Shares |
|
|
|
|
|
|
| Restricted stock |
|
|
2,597
|
5,725
|
2,025
|
|
| Common Class A |
|
|
|
|
|
|
| Shares |
|
|
|
|
|
|
| Restricted stock |
|
|
2,597
|
5,725
|
2,025
|
|
| Restricted Stock | 2010 Equity Incentive Plan | Performance Vested | Return on Investment Target One |
|
|
|
|
|
|
| Stock-Based Compensation [Line Items] |
|
|
|
|
|
|
| Vesting Percentage |
|
|
33.00%
|
|
|
|
| Return On Investment Target Percentage |
|
|
175.00%
|
|
|
|
| Restricted Stock | 2010 Equity Incentive Plan | Performance Vested | Return on Investment Target Two |
|
|
|
|
|
|
| Stock-Based Compensation [Line Items] |
|
|
|
|
|
|
| Vesting Percentage |
|
|
33.00%
|
|
|
|
| Return On Investment Target Percentage |
|
|
200.00%
|
|
|
|
| Restricted Stock | 2010 Equity Incentive Plan | Performance Vested | Return on Investment Target Three |
|
|
|
|
|
|
| Stock-Based Compensation [Line Items] |
|
|
|
|
|
|
| Vesting Percentage |
|
|
34.00%
|
|
|
|
| Return On Investment Target Percentage |
|
|
250.00%
|
|
|
|
| Restricted Stock | 2010 Equity Incentive Plan | Service Vesting Conditions | Maximum |
|
|
|
|
|
|
| Shares |
|
|
|
|
|
|
| Award vesting period (in years) |
|
|
5 years
|
|
|
|
| Restricted Stock | 2010 Equity Incentive Plan | Performance Vested, modified |
|
|
|
|
|
|
| Shares |
|
|
|
|
|
|
| Percentage of Performance Vested awards outstanding modified |
|
|
20.00%
|
|
|
|
| Incremental compensation cost |
|
|
|
|
$ 8,536
|
$ 4,322
|
| Restricted Stock | 2010 Equity Incentive Plan | Performance Vested, modified | Return on Investment Target Five |
|
|
|
|
|
|
| Stock-Based Compensation [Line Items] |
|
|
|
|
|
|
| Return On Investment Target Percentage |
350.00%
|
|
400.00%
|
|
|
|
| Restricted Stock | 2010 Equity Incentive Plan | Common Class A |
|
|
|
|
|
|
| Stock-Based Compensation [Line Items] |
|
|
|
|
|
|
| Shares reserved for issuance under the 2010 Plan |
|
86,301
|
86,301
|
|
|
|
| Restricted Stock | 2010 Equity Incentive Plan | Common Class A | Performance Vested |
|
|
|
|
|
|
| Weighted average grant date fair value |
|
|
|
|
|
|
| Unvested and outstanding at beginning of period ($ per share) |
|
$ 277.33
|
$ 278.97
|
$ 292.92
|
$ 307.45
|
|
| Granted ($ per share) |
|
0
|
|
113.90
|
204.90
|
|
| Vested ($ per share) |
|
0
|
0.00
|
0.00
|
0.00
|
|
| Forfeited ($ per share) |
|
195.75
|
283.99
|
323.53
|
264.54
|
|
| Cancelled ($ per share) |
|
281.26
|
|
|
|
|
| Modified ($ per share) |
|
|
|
|
296.69
|
|
| Unvested and outstanding at end of period ($ per share) |
|
$ 0
|
$ 277.33
|
$ 278.97
|
$ 292.92
|
$ 307.45
|
| Shares |
|
|
|
|
|
|
| Unvested and outstanding at beginning of period (in shares) |
|
21,475
|
28,448
|
38,943
|
46,701
|
|
| Granted (in shares) |
|
0
|
0
|
599
|
10,033
|
|
| Vested (in shares) |
|
0
|
0
|
0
|
0
|
|
| Forfeited (in shares) |
|
(986)
|
(6,973)
|
(11,094)
|
(8,452)
|
|
| Cancelled (in shares) |
|
(20,489)
|
|
|
|
|
| Modified (in shares) |
|
|
|
|
(9,339)
|
|
| Unvested and outstanding at end of period (in shares) |
|
|
21,475
|
28,448
|
38,943
|
46,701
|
| Restricted Stock | 2010 Equity Incentive Plan | Common Class A | Service Vesting Conditions |
|
|
|
|
|
|
| Stock-Based Compensation [Line Items] |
|
|
|
|
|
|
| Estimated fair value per share at end of period ($ per share) |
|
$ 0
|
$ 0.00
|
|
|
|
| Vest date fair value |
|
|
|
|
|
|
| Vest date fair value |
|
$ 0
|
$ 93
|
$ 4,497
|
$ 4,118
|
|
| Weighted average grant date fair value |
|
|
|
|
|
|
| Unvested and outstanding at beginning of period ($ per share) |
|
$ 790.91
|
$ 795.13
|
$ 791.52
|
$ 634.67
|
|
| Granted ($ per share) |
|
0
|
|
533.80
|
818.50
|
|
| Vested ($ per share) |
|
812.91
|
798.85
|
775.17
|
643.55
|
|
| Forfeited ($ per share) |
|
785.70
|
799.30
|
774.21
|
631.54
|
|
| Cancelled ($ per share) |
|
775.66
|
|
|
|
|
| Modified ($ per share) |
|
|
|
|
969.00
|
|
| Unvested and outstanding at end of period ($ per share) |
|
$ 0
|
$ 790.91
|
$ 795.13
|
$ 791.52
|
$ 634.67
|
| Shares |
|
|
|
|
|
|
| Unvested and outstanding at beginning of period (in shares) |
|
6,667
|
13,979
|
25,834
|
19,246
|
|
| Granted (in shares) |
|
0
|
0
|
610
|
5,245
|
|
| Vested (in shares) |
|
(2,602)
|
(5,279)
|
(8,468)
|
(4,951)
|
|
| Forfeited (in shares) |
|
(468)
|
(2,033)
|
(3,997)
|
(3,045)
|
|
| Cancelled (in shares) |
|
(3,597)
|
|
|
|
|
| Modified (in shares) |
|
|
|
|
9,339
|
|
| Unvested and outstanding at end of period (in shares) |
|
0
|
6,667
|
13,979
|
25,834
|
19,246
|
| Restricted stock |
|
|
2,597
|
5,725
|
2,025
|
|