Loans - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans and loans past due ninety days	$ 17,386,000	$ 21,140,000	$ 27,672,000
Reduction in interest income	600,000	1,900,000	$ 1,000,000
Loans and Leases Receivable, Related Parties	4,008,000	4,514,000
Loans and Leases Receivable, Related Parties, Additions	850,000
Loans and Leases Receivable, Related Parties, Collections	1,356,000
Loans Pledged as Collateral	50,000,000	130,000,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	332,321,000	333,816,000
Allowance for Notes, Loans and Financing Receivable, Noncurrent	137,000	64,000
PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Deferred Costs, Noncurrent	$ 7,652,000	$ 3,645,000