Business Combinations Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Aug. 14, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired and LIabilities Assumed, cash on hand		$ 279,468
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans		(152,397)	$ (156,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment		(4,422)
Business Acquisition, Goodwill, Expected Tax Deductible Amount		14,015
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		6,216
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets		1,433
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		457,951
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits		453,647	$ 453,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase		3,797
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities		507
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		457,951
Business Acquisition, Transaction Costs	$ 1,100
Acquired Book Value [Member]
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired and LIabilities Assumed, cash on hand		279,468
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans		(155,774)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment		(4,547)
Business Acquisition, Goodwill, Expected Tax Deductible Amount		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		0
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets		1,433
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		441,222
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits		452,810
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase		3,797
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities		507
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		457,114
Fair Value Adjustment [Member]
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired and LIabilities Assumed, cash on hand		0
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans		(3,377)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment		(125)
Business Acquisition, Goodwill, Expected Tax Deductible Amount		14,015
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		6,216
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		16,729
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits		837
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Securities Sold Under Agreements to Repurchase		0
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Liabilities		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		$ 837