Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net cash provided by (used in) operating activities - continuing operations	$ 102,847	$ 91,182
Net cash used in investing activities - continuing operations	(195,072)	(191,961)
Net cash provided by (used in) financing activities - continuing operations	(109)	693
Net cash provided by (used in) discontinued operations	(2,685)	119,118
Net increase (decrease) in cash and cash equivalents	(95,019)	19,032
Cash and Cash Equivalents, Beginning of Period	157,439	52,614
Cash and Cash Equivalents, End of Period	62,420	71,646
Parent Company [Member]
Net cash provided by (used in) operating activities - continuing operations	(47,345)	(8,924)
Net cash used in investing activities - continuing operations	(44,880)	(91,671)
Net cash provided by (used in) financing activities - continuing operations	(109)	693
Net cash provided by (used in) discontinued operations	(2,685)	119,637
Net increase (decrease) in cash and cash equivalents	(95,019)	19,735
Cash and Cash Equivalents, Beginning of Period	157,439	51,894
Cash and Cash Equivalents, End of Period	62,420	71,629
Combined Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities - continuing operations	150,192	100,106
Net cash used in investing activities - continuing operations	(200,230)	(238,759)
Net cash provided by (used in) financing activities - continuing operations	50,038	138,469
Net cash provided by (used in) discontinued operations	0	0
Net increase (decrease) in cash and cash equivalents	0	(184)
Cash and Cash Equivalents, Beginning of Period	0	201
Cash and Cash Equivalents, End of Period	0	17
Combined Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities - continuing operations	0	0
Net cash used in investing activities - continuing operations	(303)	0
Net cash provided by (used in) financing activities - continuing operations	303	0
Net cash provided by (used in) discontinued operations	0	(519)
Net increase (decrease) in cash and cash equivalents	0	(519)
Cash and Cash Equivalents, Beginning of Period	0	519
Cash and Cash Equivalents, End of Period	0	0
Eliminations [Member]
Net cash provided by (used in) operating activities - continuing operations	0	0
Net cash used in investing activities - continuing operations	50,341	138,469
Net cash provided by (used in) financing activities - continuing operations	(50,341)	(138,469)
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