Business Combinations Estimated Fair Values Of Assets Acquired And Liabilities Assumed (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Aug. 14, 2015
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 2,700	$ 279,468
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans		152,397
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment		4,422
Business Acquisition, Goodwill, Expected Tax Deductible Amount		14,274
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		1,174
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		457,951
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits		453,647
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 Combination, Acquisition Related Costs	$ 1,400
Finite-Lived Intangible Asset, Useful Life	10 years
Acquired Book Value [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		279,468
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans	$ 156,000	155,774
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premises And Equipment		4,547
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	$ 453,000	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 Adjustments [Member]
Business Acquisition [Line Items]
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		14,274
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		(259)
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, Liabilities		$ 837