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
Condensed Financial Statements, Captions [Line Items]
Net income	$ 28,337	$ 29,355	$ 25,530
Depreciation and amortization	5,429	4,583	4,181
Share-based compensation	674	471	407
(Increase) decrease in other assets	(545)	(1,606)	(6,640)
Decrease in other liabilities	376	(2,991)	6,981
Net cash provided by operating activities	43,089	35,229	37,198
Net cash paid for acquisition		7,995
Net cash used in investing activities	(305,874)	(153,490)	(242,192)
Issuance of long-term debt, net of issuance costs	40,000
Proceeds from stock options exercised	359	667	448
Net cash provided by financing activities	264,755	116,720	204,250
Net increase (decrease) in cash and cash equivalents	1,970	(1,541)	(744)
Cash and cash equivalents, beginning of period	58,151	59,692	60,436
Cash and cash equivalents, end of period	60,121	58,151	59,692
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	28,337	29,355	25,530
Equity in undistributed earnings of subsidiary	(14,008)	(10,261)	(11,977)
Depreciation and amortization	97	48	47
Share-based compensation	674	471	407
(Increase) decrease in other assets	(1,069)	5,661	166
Decrease in other liabilities	(258)	(5,717)	(17)
Net cash provided by operating activities	13,773	19,557	14,156
Capital investment in Five Star Bank	(34,000)
Net cash paid for acquisition		(7,995)
Net cash used in investing activities	(34,000)	(7,995)
Issuance of long-term debt, net of issuance costs	38,940
Purchase of preferred and common shares	(202)	(196)	(360)
Proceeds from stock options exercised	359	667	448
Dividends paid	(12,721)	(11,984)	(11,218)
Other	79		(118)
Net cash provided by financing activities	26,455	(11,513)	(11,248)
Net increase (decrease) in cash and cash equivalents	6,228	49	2,908
Cash and cash equivalents, beginning of period	9,559	9,510	6,602
Cash and cash equivalents, end of period	$ 15,787	$ 9,559	$ 9,510