• Filing Date: 2017-02-22
  • Form Type: 10-K
  • Description: Annual report
v3.6.0.2
Stock Based Compensation - Information with Respect to Unvested Restricted Stock Awards Stock Option and Incentive Plan (Detail) - Restricted Stock [Member] - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, shares 620,513 639,705 735,650
Granted, Number of Restricted Stock Awards 142,440 83,260 108,720
Vested, Number of Restricted Stock Awards (47,152) (59,695) (193,825)
Cancelled, Number of Restricted Stock Awards (160,000)    
Forfeited, Number of Restricted Stock Awards (13,298) (42,757) (10,840)
Ending balance, shares 542,503 620,513 639,705
Nonvested, Weighted-Average Grant Date Fair Value, Beginning balance $ 30.33 $ 28.33 $ 25.48
Granted, Weighted-Average Grant Date Fair Value 32.35 44.46 47.40
Vested, Weighted-Average Grant Date Fair Value 42.27 30.13 27.48
Cancelled, Weighted-Average Grant Date Fair Value 26.27    
Forfeited, Weighted-Average Grant Date Fair Value 39.06 28.15 41.53
Nonvested, Weighted-Average Grant Date Fair Value, Ending balance $ 30.81 $ 30.33 $ 28.33