Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 12,054	$ 9,063	$ 35,235	$ 24,121
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during period	(1,676)	2,542	(18,240)	4,325
Tax effect	639	(969)	6,955	(1,649)
Reclassification adjustment for gains included in net income				(61)
Tax effect				23
Net of tax amount	(1,037)	1,573	(11,285)	2,638
Unrealized gains (losses) on derivative financial instruments qualifying as cash flow hedges:
Unrealized holding gains (losses) arising during period	(77)	(140)	225	(407)
Tax effect	29	53	(86)	152
Reclassification adjustment for losses included in interest expense	77	74	229	218
Tax effect	(29)	(28)	(87)	(80)
Net of tax amount		(41)	281	(117)
Other comprehensive income (loss), net of tax	(1,037)	1,532	(11,004)	2,521
Comprehensive income	$ 11,017	$ 10,595	$ 24,231	$ 26,643