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Share-Based Compensation - Restricted Stock Units (Details)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 30, 2014
shares
Dec. 31, 2015
USD ($)
company
shares
Number of Shares (in shares)    
Outstanding at beginning of year   1,622,328
Granted   182,505
Cancelled/forfeited   (260,222)
Vested/Paid   (687,704)
Outstanding at end of year   856,907
Cash settled stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total value of stock that vested | $   $ 0.7
Liability for RSUs outstanding and expected to vest   200,000
Number of Shares (in shares)    
Outstanding at beginning of year   1,379,261
Granted   182,505
Cancelled/forfeited   (120,438)
Vested/Paid   (687,704)
Outstanding at end of year   753,624
Market Based Restricted Stock Units    
Number of Shares (in shares)    
Granted 243,067 0
Cancelled/forfeited   (139,784)
Vested/Paid   0
Outstanding at end of year   103,283
Evaluation period (in days)   20 days
Number of peer group companies | company   12
Minimum | Market Based Restricted Stock Units    
Number of Shares (in shares)    
Earning percentage   0.00%
Maximum | Market Based Restricted Stock Units    
Number of Shares (in shares)    
Earning percentage   200.00%