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Goodwill and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]      
2017 $ (5,206)    
2018 (3,306)    
2019 (3,010)    
2020 (2,883)    
2021 (2,694)    
Thereafter (13,781)    
Total (30,880) $ (24,559) $ (31,158)
VOBA      
Finite-Lived Intangible Assets [Line Items]      
2017 (2,535)    
2018 (2,595)    
2019 (2,581)    
2020 (2,681)    
2021 (2,666)    
Thereafter (34,555)    
Total $ (47,613)