Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 21,030us-gaap_NetIncomeLoss	$ 17,435us-gaap_NetIncomeLoss	$ 16,187us-gaap_NetIncomeLoss
Other comprehensive income:
Unrealized gain (loss) on available for sale securities	5,784	(8,942)	(133)
Reclassification adjustment for net gains arising during the period	(1,884)		(100)
Change in fair value of derivative used for cash flow hedge	381	1,228	(361)
Other comprehensive income (loss), before tax	4,281	(7,714)	(594)
Tax (expense) benefit related to items of other comprehensive income (loss)	(1,665)	2,975	211
Other comprehensive income (loss), net of tax	2,616	(4,739)	(383)
Comprehensive income	$ 23,646us-gaap_ComprehensiveIncomeNetOfTax	$ 12,696us-gaap_ComprehensiveIncomeNetOfTax	$ 15,804us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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