GUARANTOR - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets Abstract
Current Assets	$ 106,065	$ 110,004
Property And Equipment - Net	57,993	44,662
Deferred Charges And Other Assets - Net	11,934	13,239
Investments In Affiliates Subsidiaries Associates And Joint Ventures	0	0
Assets	1,022,108	926,615
LIABILITIES AND SHAREHOLDERS' EQUITY
Liabilities Current	68,601	30,761
Liabilities Noncurrent	564,438	566,833
Liabilities, Total	633,039	597,594
Perpetual Convertible Preferred Stock, Value, Issued	27,619	0
Stockholders Equity Abstract
Common Stock Value	397	391
Additional Paid In Capital Common Stock	611,754	608,515
Retained Earnings Accumulated Deficit	(250,701)	(279,885)
Accumulated Other Comprehensive Income Loss Net Of Tax	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	361,450	329,021	$ 298,393	$ 269,494
Liabilities And Stockholders Equity	1,022,108	926,615
Parent Company [Member]
Assets Abstract
Current Assets	7,289	6,446
Property And Equipment - Net	472	495
Deferred Charges And Other Assets - Net	3,807	2,233
Investments In Affiliates Subsidiaries Associates And Joint Ventures	424,493	360,091
Assets	436,061	369,265
LIABILITIES AND SHAREHOLDERS' EQUITY
Liabilities Current	19,631	14,041
Liabilities Noncurrent	27,361	26,203
Liabilities, Total	46,992	40,244
Perpetual Convertible Preferred Stock, Value, Issued	27,619	0
Stockholders Equity Abstract
Common Stock Value	397	391
Additional Paid In Capital Common Stock	611,754	608,515
Retained Earnings Accumulated Deficit	(250,701)	(279,885)
Accumulated Other Comprehensive Income Loss Net Of Tax	0	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	361,450	329,021	$ 298,393	$ 269,494
Liabilities And Stockholders Equity	$ 436,061	$ 369,265