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Other Borrowings and Securities Sold Under Repurchase Agreements - Schedule of Borrowings (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]    
FHLB advances $ 985,000 $ 485,000
FHLB long-term notes payable 5,781 6,399
Total other borrowings 990,781 491,399
Securities sold under repurchase agreements 320,430 315,253
Total $ 1,311,211 $ 806,652