Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets	$ 153,068	$ 206,823
Current assets held for sale	0	1,882
Assets of discontinued operations	6,875	0
Property and equipment, net	1,802,862	1,487,674
Investments in subsidiaries	0	0
LONG-TERM ASSETS HELD FOR SALE	0	132,626
Other assets	47,492	54,991
TOTAL ASSETS	2,010,297	1,883,996
Current liabilities	360,367	250,255
Current liabilities associated with assets held for sale	0	48,663
Liabilities of discontinued operations	9,936	0
Long-term liabilities	963,743	976,515
LONG-TERM LIABILITIES ASSOCIATED WITH ASSETS HELD FOR SALE	0	23,547
LIABILITIES OF DISCONTINUED OPERATIONS	17,999	0
Shareholders’ equity (deficit)	658,252	585,016
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	2,010,297	1,883,996
Parent Company [Member]
Current assets	1,779,723	1,689,430
Current assets held for sale		0
Assets of discontinued operations	6,875
Property and equipment, net	469	23,041
Investments in subsidiaries	20,539	14,588
LONG-TERM ASSETS HELD FOR SALE		12,670
Other assets	52,108	46,913
TOTAL ASSETS	1,859,714	1,786,642
Current liabilities	250,191	179,221
Current liabilities associated with assets held for sale		9,880
Liabilities of discontinued operations	9,936
Long-term liabilities	933,960	973,003
LONG-TERM LIABILITIES ASSOCIATED WITH ASSETS HELD FOR SALE		0
LIABILITIES OF DISCONTINUED OPERATIONS	17,999
Shareholders’ equity (deficit)	647,628	624,538
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	1,859,714	1,786,642
Combined Guarantor Subsidiaries [Member]
Current assets	153,382	130,487
Current assets held for sale		0
Assets of discontinued operations	0
Property and equipment, net	1,780,872	1,443,064
Investments in subsidiaries	0	0
LONG-TERM ASSETS HELD FOR SALE		0
Other assets	0	16,928
TOTAL ASSETS	1,934,254	1,590,479
Current liabilities	1,890,213	1,631,887
Current liabilities associated with assets held for sale		0
Liabilities of discontinued operations	0
Long-term liabilities	23,502	3,512
LONG-TERM LIABILITIES ASSOCIATED WITH ASSETS HELD FOR SALE		0
LIABILITIES OF DISCONTINUED OPERATIONS	0
Shareholders’ equity (deficit)	20,539	(44,920)
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	1,934,254	1,590,479
Combined Non-Guarantor Subsidiaries [Member]
Current assets	0	0
Current assets held for sale		1,882
Assets of discontinued operations	0
Property and equipment, net	0	0
Investments in subsidiaries	0	0
LONG-TERM ASSETS HELD FOR SALE		119,956
Other assets	0	0
TOTAL ASSETS	0	121,838
Current liabilities	0	0
Current liabilities associated with assets held for sale		38,783
Liabilities of discontinued operations	0
Long-term liabilities	0	0
LONG-TERM LIABILITIES ASSOCIATED WITH ASSETS HELD FOR SALE		23,547
LIABILITIES OF DISCONTINUED OPERATIONS	0
Shareholders’ equity (deficit)	0	59,508
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	0	121,838
Eliminations [Member]
Current assets	(1,780,037)	(1,613,094)
Current assets held for sale		0
Assets of discontinued operations	0
Property and equipment, net	21,521	21,569
Investments in subsidiaries	(20,539)	(14,588)
LONG-TERM ASSETS HELD FOR SALE		0
Other assets	(4,616)	(8,850)
TOTAL ASSETS	(1,783,671)	(1,614,963)
Current liabilities	(1,780,037)	(1,560,853)
Current liabilities associated with assets held for sale		0
Liabilities of discontinued operations	0
Long-term liabilities	6,281	0
LONG-TERM LIABILITIES ASSOCIATED WITH ASSETS HELD FOR SALE		0
LIABILITIES OF DISCONTINUED OPERATIONS	0
Shareholders’ equity (deficit)	(9,915)	(54,110)
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ (1,783,671)	$ (1,614,963)