CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (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 Comprehensive Income [Abstract]
Net income	$ 15,160	$ 10,815	$ 28,780	$ 22,680
Other comprehensive income net of tax:
Unrealized holding gain (loss) on securities available for sale arising during the period, net of tax of $3,149, $5,201, $5,953 and $6,340	5,849	(9,659)	11,055	(11,773)
Unrealized gain on securities available for sale for which a portion of an other than temporary impairment has been recognized in income, net of tax of $290, $113, $916 and $151	538	209	1,702	281
Unrealized gain (loss) on cash flow hedges arising during the period, net of tax of $452, $525, $895 and $629	(840)	976	(1,663)	1,169
Amortization of items previously recorded in accumulated other comprehensive income, net of tax of $39 and $384		73		713
Reclassification adjustment for losses included in net income, net of tax of $172, $17, $256 and $37	(321)	(30)	(474)	(70)
Period change	5,226	(8,431)	10,620	(9,680)
Comprehensive income	$ 20,386	$ 2,384	$ 39,400	$ 13,000