Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Net cash provided by operating activities - continuing operations	$ 310,253	$ 176,639
Net cash used in investing activities - continuing operations	(503,401)	(436,220)
Net cash provided by financing activities - continuing operations	17,439	247,069
Net cash provided by (used in) discontinued operations	128,823	(1,312)
Net increase (decrease) in cash and cash equivalents	(46,886)	(13,824)
CASH AND CASH EQUIVALENTS, beginning of period	52,614	28,112
CASH AND CASH EQUIVALENTS, end of period	5,728	14,288
Parent Company [Member]
Net cash provided by operating activities - continuing operations	(22,222)	31,974
Net cash used in investing activities - continuing operations	(170,725)	(306,682)
Net cash provided by financing activities - continuing operations	17,439	264,344
Net cash provided by (used in) discontinued operations	129,342
Net increase (decrease) in cash and cash equivalents	(46,166)	(10,364)
CASH AND CASH EQUIVALENTS, beginning of period	51,894	19,134
CASH AND CASH EQUIVALENTS, end of period	5,728	8,770
Combined Guarantor Subsidiaries [Member]
Net cash provided by operating activities - continuing operations	332,475	144,665
Net cash used in investing activities - continuing operations	(601,936)	(379,182)
Net cash provided by financing activities - continuing operations	269,260	232,369
Net cash provided by (used in) discontinued operations	0	0
Net increase (decrease) in cash and cash equivalents	(201)	(2,148)
CASH AND CASH EQUIVALENTS, beginning of period	201	7,263
CASH AND CASH EQUIVALENTS, end of period	0	5,115
Combined Non-Guarantor Subsidiaries [Member]
Net cash provided by operating activities - continuing operations	0	0
Net cash used in investing activities - continuing operations	(1,624)	0
Net cash provided by financing activities - continuing operations	1,624	0
Net cash provided by (used in) discontinued operations	(519)	(1,312)
Net increase (decrease) in cash and cash equivalents	(519)	(1,312)
CASH AND CASH EQUIVALENTS, beginning of period	519	1,715
CASH AND CASH EQUIVALENTS, end of period	0	403
Eliminations [Member]
Net cash provided by operating activities - continuing operations	0	0
Net cash used in investing activities - continuing operations	270,884	249,644
Net cash provided by financing activities - continuing operations	(270,884)	(249,644)
Net cash provided by (used in) discontinued operations	0	0
Net increase (decrease) in cash and cash equivalents	0	0
CASH AND CASH EQUIVALENTS, beginning of period	0	0
CASH AND CASH EQUIVALENTS, end of period	$ 0	$ 0