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Goodwill and Other Intangible Assets - Carrying Value of Goodwill and Other Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
Goodwill $ 37,900 $ 41,774
Identified intangibles, net 0 1,681
Total $ 37,900 $ 43,455