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Stock-Based Compensation (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
6 Months Ended 11 Months Ended
Jun. 30, 2014
D
Jun. 30, 2013
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of days after year-end in which substantially all awards are made 90    
Amount of grant-date fair value expensed immediately for awards granted to retirement-eligible grantees $ 1,358 $ 973  
Purchase of treasury stock, shares 204,574 183,375  
Purchase of treasury stock, aggregate cost basis 3,781 3,226 3,167
Stock options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted 233,914    
Grant-date fair value $ 11.60    
Stock options expected term 5 years 6 months    
Stock options expected volatility 71.50%    
Stock options risk-free interest rate 1.91%    
Stock options expected dividend yield 0.00%    
Exercise price of options $ 18.73    
Unrecognized compensation cost 4,276    
Weighted-average period of unrecognized compensation cost expected to be recognized 31 months    
Restricted stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted 602,602    
Grant-date fair value $ 18.73    
Unrecognized compensation cost 22,494    
Weighted-average period of unrecognized compensation cost expected to be recognized 33 months    
Performance shares [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted 309,750    
Grant-date fair value $ 18.23    
Unrecognized compensation cost $ 10,683    
Weighted-average period of unrecognized compensation cost expected to be recognized 33 months