Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income Tax [Abstract]
Income tax expense	$ 1,957	$ 1,780
Gross unrecognized tax benefits	1,000		$ 1,000
Valuation Allowance [Line Items]
Valuation allowance	1,100		1,100
Mepco [Member]
Valuation Allowance [Line Items]
Valuation allowance against deferred tax assets attributable to Mepco	$ 1,100		$ 1,100