Share-Based Compensation - Additional Information (Detail)
|
|
3 Months Ended |
9 Months Ended |
|
|
May 10, 2016
shares
|
Sep. 30, 2016
USD ($)
shares
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
Deferrals
shares
|
Sep. 30, 2015
USD ($)
$ / shares
shares
|
Dec. 31, 2015
shares
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Restricted shares granted under incentive plan | shares |
|
|
|
89,142
|
|
|
| Weighted average grant date fair value options granted | $ / shares |
|
|
|
|
$ 11.78
|
|
| Deferred shares and held by the rabbi trust | shares |
|
297,281
|
|
297,281
|
|
296,635
|
| Stock Options [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Exercised, Number of Shares | shares |
|
|
|
6,450
|
0
|
|
| Cash received for the exercise of stock options awards |
|
|
|
$ 200,000
|
|
|
| Compensation expenses |
|
|
|
$ 0
|
$ 0
|
|
| Restricted Stock Units (RSUs) [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Common shares reserved for awards | shares |
|
800,000
|
|
800,000
|
|
|
| Performance period |
|
|
|
3 years
|
|
|
| Time-Based RSUs [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Compensation expenses |
|
$ 100,000
|
$ 100,000
|
$ 200,000
|
200,000
|
|
| Compensation cost expected to be recognized over period |
|
400,000
|
|
$ 400,000
|
|
|
| Weighted-average period |
|
|
|
1 year 9 months 18 days
|
|
|
| Performance-Based RSUs [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Weighted-average period |
|
|
|
2 years 1 month 6 days
|
|
|
| Performance-based compensation expense (income) |
|
300,000
|
(1,000,000)
|
$ 600,000
|
(800,000)
|
|
| Maximum [Member] | Stock Options [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Total intrinsic value of stock options |
|
|
|
100,000
|
|
|
| Maximum [Member] | Service and Performance-based RSUs [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Excess tax benefits from restricted share awards |
|
|
|
100,000
|
100,000
|
|
| Grant 2015 [Member] | Performance-Based RSUs [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Increase (Reduction) in performance-based compensation expense |
|
100,000
|
|
(200,000)
|
|
|
| Grant 2013 [Member] | Performance-Based RSUs [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Increase (Reduction) in performance-based compensation expense |
|
|
(800,000)
|
|
(800,000)
|
|
| Grant 2014 [Member] | Performance-Based RSUs [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Increase (Reduction) in performance-based compensation expense |
|
|
(600,000)
|
|
$ (1,200,000)
|
|
| Remaining performance-based compensation expense |
|
$ 2,000,000
|
|
$ 2,000,000
|
|
|
| Long Term Incentive Plan [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Common shares reserved for awards | shares |
|
900,000
|
|
900,000
|
|
|
| 2016 Incentive Plan [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Common shares reserved for awards | shares |
1,000,000
|
|
|
|
|
|
| Incentive plan expiry date |
May 10, 2026
|
|
|
|
|
|
| 2016 Incentive Plan [Member] | Stock Options [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Common shares reserved for awards | shares |
100,000
|
|
|
|
|
|
| Granted, Number of Shares | shares |
|
|
|
0
|
|
|
| 2016 Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Common shares reserved for awards | shares |
900,000
|
|
|
|
|
|
| Restricted shares granted under incentive plan | shares |
|
|
|
0
|
|
|
| Long Term Incentive Stock Option [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Common shares reserved for awards | shares |
|
100,000
|
|
100,000
|
|
|
| Long Term Incentive Stock Option [Member] | Maximum [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Option issued under plan vest and expire |
|
|
|
10 years
|
|
|
| Long Term Incentive Stock Option [Member] | Minimum [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Option issued under plan vest and expire |
|
|
|
5 years
|
|
|
| Long Term Incentive Plan Stock Option [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Exercised, Number of Shares | shares |
|
|
|
1,000
|
0
|
|
| Cash received for the exercise of stock options awards |
|
|
|
$ 100,000
|
|
|
| Compensation expenses |
|
|
|
$ 100,000
|
|
|
| Granted, Number of Shares | shares |
|
|
|
0
|
2,000
|
|
| Weighted-average period |
|
|
|
1 year 4 months 24 days
|
|
|
| Option issued under plan vest |
|
|
|
50.00%
|
|
|
| Option issued under plan vest and granted after 2 years |
|
|
|
75.00%
|
|
|
| Option issued under plan vest and granted after 3 years |
|
|
|
100.00%
|
|
|
| Estimated Forfeitures |
|
|
|
$ 0
|
|
|
| Expected compensation cost related to unvested awards not yet recognized |
|
$ 200,000
|
|
200,000
|
|
|
| Long Term Incentive Plan Stock Option [Member] | Maximum [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Total intrinsic value of stock options |
|
|
|
$ 100,000
|
|
|
| Compensation expenses |
|
$ 100,000
|
$ 100,000
|
|
$ 200,000
|
|
| Deferred Compensation Plan [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Number of deferrals | Deferrals |
|
|
|
2
|
|
|