Parent Company (Statements of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Net income	$ 15,131		$ 15,194		$ 14,620
Net change in other assets	(1,635)		(2,333)		2,130
Net change in other liabilities	634		(11,282)		8,726
Net cash provided by operating activities	22,564		5,662		31,393
Sale of treasury stock	15		18		14
Proceeds from exercise of stock options	0		280		0
Tax benefit from exercises of stock options	8		20		1
Cash dividends paid	(6,432)		(6,324)		(6,233)
Net cash provided by financing activities	9,038		92,321		98,475
Increase (decrease) in cash and cash equivalents	38,243		39,416		(36,214)
Cash and cash equivalents beginning of period	77,228		37,812		74,026
Cash and cash equivalents end of period	115,471		77,228		37,812
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	15,131		15,194		14,620
Net change in other assets	65		170		(84)
Net change in other liabilities	(121)		(116)		66
Equity in undistributed earnings of subsidiaries	(10,211)	[1]	(8,721)	[1]	(7,832)	[1]
Net cash provided by operating activities	4,864		6,527		6,770
Sale of treasury stock	15		18		14
Proceeds from exercise of stock options	0		280		(1)
Tax benefit from exercises of stock options	8		20		1
Cash dividends paid	(6,432)		(6,324)		(6,233)
Other, net	226		200		206
Net cash provided by financing activities	(6,183)		(5,806)		(6,013)
Increase (decrease) in cash and cash equivalents	(1,319)		721		757
Cash and cash equivalents beginning of period	4,116		3,395		2,638
Cash and cash equivalents end of period	$ 2,797		$ 4,116		$ 3,395

[1] Account balances are partially or fully eliminated in consolidation