Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed expected income tax expense (benefit)	35.00%	35.00%	35.00%
Goodwill impairment basis difference	$ 36,664	$ 0	$ 0
Sold operations basis difference	686	0	0
Net effect of state income taxes	857	1,817	918
Foreign subsidiary dividend inclusions	557	135	1,125
Foreign tax rate benefit	(90)	(749)	(570)
Change in beginning of year valuation allowance	(153)	(537)	(87)
Non deductible interest	715	0	0
Other, net	(155)	(408)	(76)
Total income tax expense	(31,914)	13,315	15,176
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Computed expected income tax expense (benefit)	$ (70,995)	$ 13,057	$ 13,866
Goodwill impairment basis difference	(18.10%)	0.00%	0.00%
Sold operations basis difference	(0.30%)	0.00%	0.00%
Net effect of state income taxes	(0.40%)	4.90%	2.30%
Foreign subsidiary dividend inclusions	(0.30%)	0.40%	2.80%
Foreign tax rate benefit	0.00%	(2.00%)	(1.40%)
Change in beginning of year valuation allowance	0.10%	(1.40%)	(0.20%)
Non deductible interest	(0.40%)	0.00%	0.00%
Other, net	0.10%	(1.20%)	(0.20%)
Income tax expense (benefit) for the period	15.70%	35.70%	38.30%