Accumulated Other Comprehensive Income (Changes in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 1,007
Other comprehensive income, net of tax	414	$ 1,056	$ (482)
Ending balance	1,421	1,581	1,007
Gains and Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(679)	(935)	(935)
Other comprehensive income (loss) before reclassifications	70	(102)
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive income, net of tax	70	(102)
Ending balance	(609)	(1,037)	(679)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	1,686	1,460	1,460
Other comprehensive income (loss) before reclassifications	450	1,170
Amounts reclassified from accumulated other comprehensive income	(106)	(12)
Other comprehensive income, net of tax	344	1,158
Ending balance	$ 2,030	$ 2,618	$ 1,686