Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Holiday [Line Items]
Operating loss carryforwards	$ 6,100
Management placed valuation allowance	1,320	$ 1,194
Accumulated undistributed earnings	$ 42,100
Effective income tax rate	32.60%	36.60%	36.70%
Internal Revenue Service (IRS) [Member]
Income Tax Holiday [Line Items]
Effective income tax rate	35.00%