Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]
Unrealized gain (loss) on interest rate swaps, net of tax	$ 37	$ (95)	$ 58	$ (101)
Reclassification adjustment for losses recognized in earnings, net of tax	(33)	(37)	(67)	(71)
Unrealized gains on other-than-temporarily impaired securities available for sale arising during the period, net of tax	0	(25)	(48)	(11)
Unrealized gains (losses) on other securities available for sale arising during the period, net of tax	(1,726)	8,762	(4,032)	9,627
Reclassification adjustment for realized gains included in net income, net of tax	$ 48	$ 88	$ 71	$ 115