XML 86 R60.htm IDEA: XBRL DOCUMENT v3.3.1.900
Equity Incentive Awards - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Feb. 02, 2015
Feb. 29, 2016
Nov. 30, 2015
Jun. 30, 2015
May. 31, 2015
Feb. 28, 2015
May. 31, 2014
May. 13, 2014
May. 31, 2013
Apr. 30, 2013
Mar. 31, 2013
Feb. 28, 2013
Jan. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]                                  
Stock Issued During Period, Shares, Restricted Stock Award, Gross                           158,013 186,666 173,332  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number                         1,105,600 1,085,600 1,085,600 1,105,600  
Common stock issued through exercise of options                           220,000 0 20,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number                           865,600 1,085,600 1,085,600 1,105,600
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price                           $ 23.12 $ 21.95 $ 21.95 $ 21.78
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value                           $ 8,600,000 $ 0 $ 500,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value                           $ 37,700,000 $ 32,100,000 $ 15,500,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term                           1 year 7 months      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term                           1 year 7 months 2 years 1 month 1 day 3 years 1 month 1 day 4 years 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number                           865,600      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price                           $ 23.12      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price                           $ 17.35 $ 0.00 $ 12.34  
Director                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights     One-third   One-third One-third One-third One-third One-third   One-third   One-third        
Director | Subsequent Event [Member]                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights   One-third                              
Management                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights Full     Full     Full     Full   Full          
Management | Subsequent Event [Member]                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights   Full                              
Maximum                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant                           3,750,000      
Restricted Stock                                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]                                  
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodNetOfForfeitures                         94,020 102,225 99,788 94,020  
Stock Issued During Period, Shares, Restricted Stock Award, Gross                           158,014 186,666 173,332  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period                           (174,739) (184,229) (167,564)  
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodNetOfForfeitures                           85,500 102,225 99,788 94,020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value                           $ 49.72 $ 41.09 $ 37.17 $ 32.97
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value                           54.68 42.61 37.32  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value                           $ 49.17 $ 40.49 $ 34.97  
Restricted Stock                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation expense, restricted stock grant                           $ 8,600,000 $ 7,600,000 $ 6,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]                                  
Share based compensation expense to be recognized                           $ 3,800,000      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition                           1 year 5 months 1 day      
Restricted Stock | Director                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     473   29,440 47,101 62,000 40,000 40,000   666   62,000        
Share based compensation, fair market value     $ 28,300,000   $ 1,600,000 $ 2,600,000 $ 2,600,000 $ 1,700,000 $ 1,700,000   $ 24,800   $ 2,200,000        
Restricted Stock | Director | Subsequent Event [Member]                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   45,784                              
Share based compensation, fair market value   $ 3,100,000                              
Restricted Stock | Director | Phase One                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation, restricted stock, vesting date     May 03, 2016   Nov. 12, 2015 Dec. 31, 2015 Dec. 31, 2014 Nov. 13, 2014 Nov. 08, 2013   Sep. 13, 2013   Dec. 31, 2013        
Restricted Stock | Director | Phase One | Subsequent Event [Member]                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation, restricted stock, vesting date   Dec. 31, 2016                              
Restricted Stock | Director | Phase Two                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation, restricted stock, vesting date     Nov. 03, 2016   May 12, 2016 Dec. 31, 2016 Dec. 31, 2015 May 13, 2015 May 08, 2014   Mar. 13, 2014   Dec. 31, 2014        
Restricted Stock | Director | Phase Two | Subsequent Event [Member]                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation, restricted stock, vesting date   Dec. 31, 2017                              
Restricted Stock | Director | Phase Three                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation, restricted stock, vesting date     Nov. 03, 2017   May 12, 2017 Dec. 31, 2017 Dec. 31, 2016 May 13, 2016 May 08, 2015   Mar. 13, 2015   Dec. 31, 2015        
Restricted Stock | Director | Phase Three | Subsequent Event [Member]                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share based compensation, restricted stock, vesting date   Dec. 31, 2018                              
Restricted Stock | Management                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period       3,000   78,000 84,666     2,000   68,666          
Share based compensation, fair market value       $ 200,000   $ 4,300,000 $ 3,600,000     $ 80,200   $ 2,500,000          
Share based compensation, restricted stock, vesting date       Dec. 31, 2015   Dec. 31, 2015 Dec. 31, 2014     Dec. 31, 2013   Dec. 31, 2013          
Restricted Stock | Management | Subsequent Event [Member]                                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   73,000                              
Share based compensation, fair market value   $ 4,900,000                              
Share based compensation, restricted stock, vesting date   Dec. 31, 2016