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Subsequent Events (Details) - USD ($)
12 Months Ended
Feb. 10, 2016
Jan. 05, 2016
Jun. 10, 2015
Apr. 13, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Feb. 08, 2016
Subsequent Event [Line Items]                
Preferred Stock, Redemption Price Per Share         $ 25.00      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         6 years      
Subsequent Event [Member]                
Subsequent Event [Line Items]                
Proceeds from Issuance of Debt   $ 150,000,000            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years              
Second Term Loan [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Increase in Borrowing Capacity   75,000,000            
Maximum borrowing capacity   175,000,000            
Third Term Loan [Member]                
Subsequent Event [Line Items]                
Maximum borrowing capacity     $ 250,000,000          
Third Term Loan [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Increase in Borrowing Capacity   75,000,000            
Maximum borrowing capacity   $ 200,000,000            
Weighted average interest rate   3.21%            
7.875% Series A [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Preferred Stock, Redemption Price Per Share               $ 25.00
Common Shares [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Stock Repurchase Program, Authorized Amount $ 150,000,000              
Restricted Stock [Member]                
Subsequent Event [Line Items]                
Share-based equity award grant         46,446 44,322 84,451  
Restricted Stock [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Share-based equity award grant 67,280              
Restricted Stock [Member] | Minimum [Member]                
Subsequent Event [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         3 years      
Restricted Stock [Member] | Maximum [Member]                
Subsequent Event [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         5 years      
Performance Shares [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Share-based equity award grant 100,919              
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Second Term Loan [Member]                
Subsequent Event [Line Items]                
Debt Instrument, Basis Spread on Variable Rate       1.70%        
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Second Term Loan [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Debt Instrument, Basis Spread on Variable Rate   1.70%            
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Third Term Loan [Member]                
Subsequent Event [Line Items]                
Debt Instrument, Basis Spread on Variable Rate     1.45%          
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Second Term Loan [Member]                
Subsequent Event [Line Items]                
Debt Instrument, Basis Spread on Variable Rate       2.55%        
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Second Term Loan [Member] | Subsequent Event [Member]                
Subsequent Event [Line Items]                
Debt Instrument, Basis Spread on Variable Rate   2.55%            
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Third Term Loan [Member]                
Subsequent Event [Line Items]                
Debt Instrument, Basis Spread on Variable Rate     2.20%