Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 11,193	$ 10,269	$ 29,296	$ 26,166
Cash flow hedges:
Net unrealized gain (loss)	88	507	184	(2,218)
Reclassification to operations	188	275	419	833
Total	276	782	603	(1,385)
Total other comprehensive income (loss) items	(590)	920	1,896	(1,669)
Cash flow hedges:
Net unrealized gain (loss)	34	193	70	(843)
Reclassification to operations	71	105	158	317
Total tax expense (benefit)	105	298	228	(526)
Total income tax provision (benefit)	(223)	350	716	(634)
Other comprehensive income (loss), net of tax	(367)	570	1,180	(1,035)
Comprehensive income	10,826	10,839	30,476	25,131
Available for sale securities
Other comprehensive income (loss) items:
Net unrealized gain (loss)	(399)	695	2,601	1,196
Reclassification to operations	2	(98)	5	(95)
Total	(397)	597	2,606	1,101
Income tax provision:
Net unrealized gain	(151)	263	983	454
Reclassification to operations	1	(37)	2	(36)
Total tax expense (benefit)	(150)	226	985	418
Held to maturity securities
Other comprehensive income (loss) items:
Reclassification to operations	(469)	(459)	(1,313)	(1,385)
Total	(469)	(459)	(1,313)	(1,385)
Income tax provision:
Reclassification to operations	(178)	(174)	(497)	(526)
Total tax expense (benefit)	$ (178)	$ (174)	$ (497)	$ (526)