Loans - Summary of TDRs (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 85,000	$ 93,066
Commercial loan portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	64,897	70,785
Consumer loan portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	20,103	22,281
Accruing TDRs
Financing Receivable, Modifications [Line Items]
Total TDRs	57,058	62,535
Accruing TDRs | Commercial loan portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	41,055	45,388
Accruing TDRs | Consumer loan portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	16,003	17,147
Nonaccrual TDRs
Financing Receivable, Modifications [Line Items]
Total TDRs	27,942	30,531
Nonaccrual TDRs | Commercial loan portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	23,842	25,397
Nonaccrual TDRs | Consumer loan portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 4,100	$ 5,134