Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangibles - Other intangible assets (Details)

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Goodwill and Other Intangibles - Other intangible assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Other intangible assets      
Gross definite-lived intangible assets $ 19,472 $ 19,727  
Accumulated amortization (17,892) (17,172)  
Net definite-lived intangible assets 1,580 2,555  
Indefinite-lived intangible assets not subject to amortization 407 407  
Other intangible assets, net 1,987 2,962  
Amortization expense recognized $ 1,026 $ 1,166 $ 1,267