CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 17,067	$ 16,122	$ 51,207	$ 44,902
Other comprehensive income net of tax:
Unrealized holding gain on securities available for sale arising during the period, net of tax of $2,439, $152, $63 and $6,105	$ 4,530	283	$ 117	11,338
Unrealized gain (loss) on securities available for sale for which a portion of an other than temporary impairment has been recognized in income, net of tax of $916		(1)		1,701
Unrealized gain (loss) on cash flow hedges arising during the period, net of tax of $627, $10, $792 and $885	$ (1,164)	18	$ (1,468)	(1,645)
Reclassification adjustment for losses included in net income, net of tax of $263, $194, $340 and $450	(490)	(360)	(633)	(834)
Period change	2,876	(60)	(1,984)	10,560
Comprehensive income	$ 19,943	$ 16,062	$ 49,223	$ 55,462