Parent Company Financial Information, Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities [Abstract]
Net Income	$ 27,392	$ 25,402	$ 24,061
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities [Abstract]
Net (Increase) Decrease in Other Assets	(5,542)	15,070	3,719
Net Cash Provided by Operating Activities	36,373	25,637	27,199
Investing Activities [Abstract]
Net Cash Used by Investing Activities	(257,354)	(278,652)	(148,890)
Financing Activities [Abstract]
Cash Dividends	(10,157)	(9,919)	(9,723)
Net Cash Provided by Financing Activities	203,302	246,463	75,942
(Decrease) Increase in Cash and Cash Equivalents	(17,679)	(6,552)	(45,749)
Parent Company [Member]
Cash Flows from Operating Activities [Abstract]
Net Income	27,392	25,402	24,061
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities [Abstract]
Equity in Undistributed Net Earnings from Subsidiary	(17,352)	(18,211)	(14,352)
Net (Increase) Decrease in Other Assets	(79)	(114)	38
Net Increase (Decrease) in Liabilities	141	(1)	180
Net Cash Provided by Operating Activities	10,102	7,076	9,927
Investing Activities [Abstract]
Payments for Investments in Subsidiaries	(3,360)	0	0
Net Cash Used by Investing Activities	(3,360)	0	0
Financing Activities [Abstract]
Issuance of Common Stock	3,360	2,790	0
Cash Dividends	(10,157)	(9,919)	(9,723)
Net Cash Provided by Financing Activities	(6,797)	(7,129)	(9,723)
(Decrease) Increase in Cash and Cash Equivalents	(55)	(53)	204
Cash and Cash Equivalents at Beginning of Year	363	416	212
Cash and Cash Equivalents at End of Year	$ 308	$ 363	$ 416