Income Taxes (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of changes in the balance of unrecognized tax benefits
Beginning balance	$ 1,422	$ 1,142	$ 1,744
Increases in tax positions for prior years	30	91	53
Increases in tax positions for current year	298	189	103
Settlements and decreases in tax positions	(66)	0	(716)
Expirations of statutes	0	0	(42)
Ending balance	$ 1,684	$ 1,422	$ 1,142