XML 82 R67.htm IDEA: XBRL DOCUMENT v3.7.0.1
Share Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Feb. 28, 2017
Apr. 30, 2014
Mar. 31, 2017
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares)     55,440
Total unrecognized compensation cost     $ 7.5
Weighted-average period of total unrecognized compensation cost, in years     1 year 2 months 12 days
Restricted Stock | Employees and Non-employee Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period     3 years
Cash-settled Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period     3 years
Granted (in shares)     33,505
Total unrecognized compensation cost     $ 4.6
Weighted-average period of total unrecognized compensation cost, in years     1 year 2 months 12 days
Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost     $ 16.6
Weighted-average period of total unrecognized compensation cost, in years     1 year 7 months 6 days
Performance Shares Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period     3 years
Granted (in shares)   63,325 65,530
Payout percent 141.00%    
Stock issued during period (in shares) 89,288    
Total unrecognized compensation cost     $ 10.7
Weighted-average period of total unrecognized compensation cost, in years     1 year 2 months 12 days