XML 103 R87.htm IDEA: XBRL DOCUMENT v3.3.1.900
Stock Based Compensation - Narrative (Details)
12 Months Ended
Dec. 31, 2015
USD ($)
equity_plan
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
Dec. 31, 2013
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of equity plans | equity_plan 2    
Weighted Average Grant Date Fair Value      
Weighted average grant date fair value, granted (in dollars per share) | $ / shares $ 15.53 $ 21.59 $ 20.49
Fair values of vested restricted stock and stock options | $ $ 0 $ 0 $ 500,000
2015 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares approved 1,500,000    
Shares available for future issuance 1,500,000    
2015 Plan | Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unvested restricted stock units outstanding 0    
Restricted stock units issued 0    
2009 Plan      
Number of Units      
Number of units, vested (less than) 100,000    
2009 Plan | Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unvested restricted stock units outstanding 0    
Restricted stock units issued 0