XML 82 R69.htm IDEA: XBRL DOCUMENT v3.8.0.1
Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]    
Goodwill $ 411,600 $ 411,600
Core deposit premiums 3,470 4,546
Customer relationship and other intangibles 4,483 5,957
Mortgage servicing rights 737 834
Total intangible assets $ 420,290 $ 422,937