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Goodwill and Other Intangible Assets (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2017
Changes in the carrying amount of goodwill        
Balance at beginning of the period $ 34,510 $ 69,699    
Purchase consideration   3,480    
Impairment (34,510) (38,669)    
Balance at the end of the period 0 34,510 $ 69,699  
Changes in the carrying amount of other intangibles with definite lives        
Intangible asset amortization 713 821 659  
Intangible assets with definite lives        
Amortization expense for intangible assets with definite useful lives        
2018       $ 624
2019       613
2020       613
2021       613
2022       126
Thereafter       0
Total 3,302 4,123 4,123 $ 2,589
Changes in the carrying amount of other intangibles with definite lives        
Balance at the beginning of the period 3,302 4,123    
Intangible asset amortization (713) (821)    
Balance at the end of the period $ 2,589 $ 3,302 $ 4,123