Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Net cash provided by operating activities - continuing operations	$ 213,722	$ 145,308
Net cash used in investing activities - continuing operations	(352,067)	(233,916)
Net cash provided by financing activities - continuing operations	(41,521)	82,179
Net cash provided by (used in) discontinued operations	131,099	(914)
Net increase (decrease) in cash and cash equivalents	(48,767)	(7,343)
CASH AND CASH EQUIVALENTS, beginning of period	52,614	28,112
CASH AND CASH EQUIVALENTS, end of period	3,847	20,769
Parent Company [Member]
Net cash provided by operating activities - continuing operations	4,319	43,723
Net cash used in investing activities - continuing operations	(142,476)	(165,100)
Net cash provided by financing activities - continuing operations	(41,521)	108,986
Net cash provided by (used in) discontinued operations	131,618	(18)
Net increase (decrease) in cash and cash equivalents	(48,060)	(12,409)
CASH AND CASH EQUIVALENTS, beginning of period	51,894	19,134
CASH AND CASH EQUIVALENTS, end of period	3,834	6,725
Combined Guarantor Subsidiaries [Member]
Net cash provided by operating activities - continuing operations	209,403	101,585
Net cash used in investing activities - continuing operations	(428,774)	(188,743)
Net cash provided by financing activities - continuing operations	219,183	93,120
Net cash provided by (used in) discontinued operations	0	0
Net increase (decrease) in cash and cash equivalents	(188)	5,962
CASH AND CASH EQUIVALENTS, beginning of period	201	7,263
CASH AND CASH EQUIVALENTS, end of period	13	13,225
Combined Non-Guarantor Subsidiaries [Member]
Net cash provided by operating activities - continuing operations	0	0
Net cash used in investing activities - continuing operations	0	0
Net cash provided by financing activities - continuing operations	0	0
Net cash provided by (used in) discontinued operations	(519)	(896)
Net increase (decrease) in cash and cash equivalents	(519)	(896)
CASH AND CASH EQUIVALENTS, beginning of period	519	1,715
CASH AND CASH EQUIVALENTS, end of period	0	819
Eliminations [Member]
Net cash provided by operating activities - continuing operations	0	0
Net cash used in investing activities - continuing operations	219,183	119,927
Net cash provided by financing activities - continuing operations	(219,183)	(119,927)
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