Supplemental Statement of Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental investing and financing activities:
Cash paid for interest	$ 1,160	$ 972	$ 1,974
Cash paid for income taxes, net	$ (1,467)	$ 4,444	$ 5,714