CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 16,286	$ 11,788	$ 41,490	$ 32,779
Securities available for sale:
Unrealized net gains (losses) on available for sale securities	(3,266)	4,813	13,276	2,617
Tax effect	1,228	(1,841)	(5,027)	(887)
Reclassification of gains on sales of securities	0	0	(194)	(85)
Tax effect	0	0	73	33
Net of tax amount	(2,038)	2,972	8,128	1,678
Cash flow hedges:
Unrealized net gains (losses) on cash flow hedges	584	(5,156)	(6,026)	(5,826)
Tax effect	(249)	1,980	2,193	2,238
Reclassification of amounts into interest expense from termination of interest rate swaps	113	35	337	43
Tax effect	(43)	(14)	(127)	(17)
Net of tax amount	405	(3,155)	(3,623)	(3,562)
Total other comprehensive income (loss)	(1,633)	(183)	4,505	(1,884)
Comprehensive income	$ 14,653	$ 11,605	$ 45,995	$ 30,895