Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
AOCI Attributable to Parent [Member]
Gain on cash flow hedges, tax expense	$ 175	$ 399	$ 380
Gain on cash flow hedges, tax expense	$ 175	$ 399	$ 380