Quaterly Results (Unaudited) Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenue, Net	$ 131,433	$ 127,202	$ 120,921	$ 107,561	$ 100,027	$ 89,806	$ 85,340	$ 82,396
Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net	(17,578)	5,041	15,210	4,330	20,351	12,984	8,187	338
Net Income (Loss) Attributable to Parent	$ (10,517)	$ 3,423	$ 9,841	$ 2,951	$ 13,802	$ 8,083	$ 5,275	$ 198	$ 5,698	$ 27,358	$ 41,013
Earnings Per Share, Basic	$ (0.49)	$ 0.16	$ 0.46	$ 0.14	$ 0.65	$ 0.38	$ 0.25	$ 0.01	$ 0.27	$ 1.29	$ 2.06
Earnings Per Share, Diluted	$ (0.49)	$ 0.16	$ 0.45	$ 0.14	$ 0.64	$ 0.38	$ 0.25	$ 0.01	$ 0.26	$ 1.28	$ 2.05