Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statement Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Income Statements, Captions [Line Items]
Total revenues	$ 196,225	$ 144,329	$ 546,912	$ 390,454
Total Costs and Expenses	65,724	136,758	400,570	320,528
Income (loss) from continuing operations before income taxes	130,501	7,571	146,342	69,926
Income tax (expense) benefit	(47,504)	(1,859)	(53,510)	(25,853)
Equity in income of subsidiaries	0	0	0	0
Income From Continuing Operations	82,997	5,712	92,832	44,073
Income (loss) from discontinued operations, net of income taxes	792	(1,191)	(748)	23,599
Net Income (loss)	83,789	4,521	92,084	67,672
Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues	0	0	0	0
Total Costs and Expenses	(8,069)	92	(5,860)	139
Income (loss) from continuing operations before income taxes	8,069	(92)	5,860	(139)
Income tax (expense) benefit	(4,654)	717	(4,342)	(1,330)
Equity in income of subsidiaries	(51,141)	(40,759)	(147,938)	(106,218)
Income From Continuing Operations	(47,726)	(40,134)	(146,420)	(107,687)
Income (loss) from discontinued operations, net of income taxes	0	0	0	0
Net Income (loss)	(47,726)	(40,134)	(146,420)	(107,687)
Parent Company [Member] | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues	924	2,428	3,696	6,075
Total Costs and Expenses	(42,829)	57,308	90,811	99,422
Income (loss) from continuing operations before income taxes	43,753	(54,880)	(87,115)	(93,347)
Income tax (expense) benefit	(15,312)	19,208	30,491	32,671
Equity in income of subsidiaries	51,141	40,759	147,938	106,218
Income From Continuing Operations	79,582	5,087	91,314	45,542
Income (loss) from discontinued operations, net of income taxes	792	(1,191)	(748)	23,599
Net Income (loss)	80,374	3,896	90,566	69,141
Combined Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues	195,301	141,901	543,216	384,379
Total Costs and Expenses	116,622	79,358	315,619	220,967
Income (loss) from continuing operations before income taxes	78,679	62,543	227,597	163,412
Income tax (expense) benefit	(27,538)	(21,784)	(79,659)	(57,194)
Equity in income of subsidiaries	0	0	0	0
Income From Continuing Operations	51,141	40,759	147,938	106,218
Income (loss) from discontinued operations, net of income taxes	0	0	0	0
Net Income (loss)	51,141	40,759	147,938	106,218
Combined Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Total revenues	0	0	0	0
Total Costs and Expenses	0	0	0	0
Income (loss) from continuing operations before income taxes	0	0	0	0
Income tax (expense) benefit	0	0	0	0
Equity in income of subsidiaries	0	0	0	0
Income From Continuing Operations	0	0	0	0
Income (loss) from discontinued operations, net of income taxes	0	0	0	0
Net Income (loss)	$ 0	$ 0	$ 0	$ 0