Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Income Tax (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax [Abstract]
Income tax expense	$ 3,159	$ 2,979	$ 8,443	$ 7,547
Gross unrecognized tax benefits	$ 800		$ 800		$ 800
Mepco [Member]
Valuation Allowance [Line Items]
Valuation allowance against deferred tax assets					$ 1,100