Comprehensive Income Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income, Changes [Roll Forward]
Accumulated other comprehensive income (loss), balance beg. of period			$ (1,042)
Other comprehensive income (loss), net of tax	$ (916)	$ 427	1,114	$ 2,570
Accumulated other comprehensive income (loss), balance end of period	72		72
Unrealized gains (losses) on securities [Member]
Accumulated Other Comprehensive Income, Changes [Roll Forward]
Accumulated other comprehensive income (loss), balance beg. of period			(1,172)	342
Other comprehensive income (loss) before reclassifications, net of tax			1,556	2,958
Amounts reclassified from accumulated other comprehensive income, net of tax.			(408)	(113)
Other comprehensive income (loss), net of tax			1,148	2,845
Accumulated other comprehensive income (loss), balance end of period	(24)	3,187	(24)	3,187
Unrealized gains (losses) on derivatives [Member]
Accumulated Other Comprehensive Income, Changes [Roll Forward]
Accumulated other comprehensive income (loss), balance beg. of period			130	(772)
Other comprehensive income (loss) before reclassifications, net of tax			(233)	(550)
Amounts reclassified from accumulated other comprehensive income, net of tax.			199	275
Other comprehensive income (loss), net of tax			(34)	(275)
Accumulated other comprehensive income (loss), balance end of period	96	(1,047)	96	(1,047)
Accumulated other comprehensive income (loss) [Member]
Accumulated Other Comprehensive Income, Changes [Roll Forward]
Accumulated other comprehensive income (loss), balance beg. of period			(1,042)	(430)
Other comprehensive income (loss) before reclassifications, net of tax			1,323	2,408
Amounts reclassified from accumulated other comprehensive income, net of tax.			(209)	162
Other comprehensive income (loss), net of tax			1,114	2,570
Accumulated other comprehensive income (loss), balance end of period	$ 72	$ 2,140	$ 72	$ 2,140