Industry Segments (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Corporate Overhead Footnote
General and administrative expense	$ 9,929	$ 8,850
Depreciation and amortization	114	253
Interest expense	6,052	4,997
Other general corporate (income) expense, net	289	463
Total	$ 16,384	$ 14,563