Fair Value - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Capitalization Rates Utilized To Determine Fair Value Of Underlying Collateral Averaged Percentage	7.80%
Loans and Leases Receivable, Allowance	$ 23,400	$ 19,128	$ 17,007	$ 20,068
Loans Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	300
Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Charge Offs	100
Other Real Estate Owned And Other Reductions	700
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	2,500
Other Real Estate Revenue	6,400
Other real estate owned and other reductions classified as level three transfers in	7,300
Loans Receivable, Fair Value Disclosure	4,100	7,500
Loans and Leases Receivable, Allowance	$ 400	$ 2,900