CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 17,404	$ 10,741	$ 25,203	$ 20,991
Securities available for sale:
Unrealized net gains (losses) on available for sale securities	9,267	(6,518)	16,542	(2,196)
Tax effect	(3,489)	2,502	(6,255)	954
Reclassification of gains on sales of securities	(64)	(84)	(194)	(85)
Tax effect	24	32	73	33
Net of tax amount	5,738	(4,068)	10,166	(1,294)
Cash flow hedges:
Unrealized net gains (losses) on cash flow hedges	(2,014)	3,493	(6,610)	(670)
Tax effect	714	(1,347)	2,442	258
Reclassification of amounts into interest expense from termination of interest rate swaps	112	8	224	8
Tax effect	(42)	(3)	(84)	(3)
Net of tax amount	(1,230)	2,151	(4,028)	(407)
Total other comprehensive income (loss)	4,508	(1,917)	6,138	(1,701)
Comprehensive income	$ 21,912	$ 8,824	$ 31,341	$ 19,290