Industry Segments (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Corporate Overhead Footnote
General and administrative expense	$ 13,440	$ 8,821	$ 33,978	$ 30,279
Depreciation and amortization	230	394	743	1,475
Interest expense	4,011	4,969	13,423	14,110
Other general corporate (income) expense, net	585	1,683	1,959	2,963
Total	$ 18,266	$ 15,867	$ 50,103	$ 48,827