XML 63 R50.htm IDEA: XBRL DOCUMENT v3.6.0.2
Stock and Incentive Compensation Plans - Additional Information (Detail) - USD ($)
$ in Millions
2 Months Ended 12 Months Ended
Mar. 02, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Shares available under all of the stock compensation plans   1,037,233    
Stock options granted   0 0 0
Stock options outstanding   0    
Subsequent Event [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Restricted stock shares granted 373,595      
Restricted stock [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Expense related to incentive compensation plan   $ 1.7 $ 1.8 $ 1.4
2005 Executive Incentive Compensation Plan [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Expense related to incentive compensation plan   1.4 $ 1.3 $ 1.0
Long-term performance based plan and defined contribution supplemental retirement plan expense   $ 0.3    
Number of common stock expected to be granted   6,125,000    
Expiration period   10 years    
2005 Executive Incentive Compensation Plan [Member] | Stock Option [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Options issued   0 0 0
2005 Executive Incentive Compensation Plan [Member] | Restricted stock [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Restricted stock shares granted   756,492 500,468 456,253
2005 Executive Incentive Compensation Plan [Member] | Minimum [Member] | Restricted stock [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Restricted stock vesting period   3 years    
2005 Executive Incentive Compensation Plan [Member] | Maximum [Member] | Restricted stock [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Restricted stock vesting period   5 years    
2005 Non-Employee Directors Restricted Stock Plan [Member]        
Stock Option Activity Under The Company's Incentive Plans [Line Items]        
Number of common stock expected to be granted   575,000    
Expiration period   10 years    
Restricted stock shares granted   53,274 90,820 20,688
Restricted stock vesting period   1 year    
Expiration date   Mar. 31, 2025