Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 34,899	$ 26,069	$ 29,007
Cash flow hedges:
Net unrealized loss	(3,504)	(905)	(2,067)
Reclassification to operations	1,060	1,082	1,310
Total	(2,444)	177	(757)
Total other comprehensive income (loss) items	(4,382)	(1,687)	2,580
Cash flow hedges:
Net unrealized loss	(1,332)	(344)	(785)
Reclassification to operations	404	411	498
Total tax expense (benefit)	(928)	67	(287)
Total income tax (provision) benefit	(1,665)	(642)	982
Other comprehensive income (loss), net of tax	(2,717)	(1,045)	1,598
Comprehensive income	32,182	25,024	30,605
Available for sale securities
Other comprehensive income (loss) items:
Net unrealized gain (loss)	(13)	358	4,491
Reclassification to operations	(94)	(318)	(1,154)
Net unrealized holding gains transferred to held to maturity		(8,821)
Total	(107)	(8,781)	3,337
Income tax provision:
Net unrealized gain (loss)	(5)	136	1,708
Reclassification to operations	(36)	(121)	(439)
Net unrealized holding gains transferred to held to maturity		(3,352)
Total tax expense (benefit)	(41)	(3,337)	$ 1,269
Held to maturity securities
Other comprehensive income (loss) items:
Reclassification to operations	(1,831)	(1,904)
Net unrealized holding gains transferred to held to maturity		8,821
Total	(1,831)	6,917
Income tax provision:
Reclassification to operations	(696)	(724)
Net unrealized holding gains transferred to held to maturity		3,352
Total tax expense (benefit)	$ (696)	$ 2,628