Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net cash provided by operating activities - continuing operations	$ 253,071	$ 155,511	$ 94,416
Net cash used in investing activities - continuing operations	(465,151)	(250,068)	(264,115)
Net cash provided by financing activities - continuing operations	237,778	116,826	169,990
Net increase (decrease) in cash and cash equivalents from continuing operations	25,698	22,269	291
Net increase (decrease) in cash and cash equivalents from discontinued operations	(1,196)	1,715	0
CASH AND CASH EQUIVALENTS, beginning of year - continuing operations	26,397	4,128	3,837
CASH AND CASH EQUIVALENTS, end of year - continuing operations	52,095	26,397	4,128
CASH AND CASH EQUIVALENTS, beginning of year - discontinued operations	1,715	0	0
CASH AND CASH EQUIVALENTS, end of year - discontinued operations	519	1,715	0
Parent Company [Member]
Net cash provided by operating activities - continuing operations	75,546	56,563	24,781
Net cash used in investing activities - continuing operations	(280,564)	(194,689)	(194,690)
Net cash provided by financing activities - continuing operations	237,778	155,842	169,990
Net increase (decrease) in cash and cash equivalents from continuing operations	32,760	17,716	81
Net increase (decrease) in cash and cash equivalents from discontinued operations	0		0
CASH AND CASH EQUIVALENTS, beginning of year - continuing operations	19,134	1,418	1,337
CASH AND CASH EQUIVALENTS, end of year - continuing operations	51,894	19,134	1,418
CASH AND CASH EQUIVALENTS, beginning of year - discontinued operations	0	0	0
CASH AND CASH EQUIVALENTS, end of year - discontinued operations	0	0	0
Combined Guarantor Subsidiaries [Member]
Net cash provided by operating activities - continuing operations	177,525	98,948	69,635
Net cash used in investing activities - continuing operations	(493,145)	(356,168)	(268,069)
Net cash provided by financing activities - continuing operations	308,558	261,773	198,644
Net increase (decrease) in cash and cash equivalents from continuing operations	(7,062)	4,553	210
Net increase (decrease) in cash and cash equivalents from discontinued operations	0		0
CASH AND CASH EQUIVALENTS, beginning of year - continuing operations	7,263	2,710	2,500
CASH AND CASH EQUIVALENTS, end of year - continuing operations	201	7,263	2,710
CASH AND CASH EQUIVALENTS, beginning of year - discontinued operations	0	0	0
CASH AND CASH EQUIVALENTS, end of year - discontinued operations	0	0	0
Combined Non-Guarantor Subsidiaries [Member]
Net cash provided by operating activities - continuing operations	0	0	0
Net cash used in investing activities - continuing operations	0	0	0
Net cash provided by financing activities - continuing operations	0	0	0
Net increase (decrease) in cash and cash equivalents from continuing operations	0	0	0
Net increase (decrease) in cash and cash equivalents from discontinued operations	(1,196)	1,715	0
CASH AND CASH EQUIVALENTS, beginning of year - continuing operations	0	0	0
CASH AND CASH EQUIVALENTS, end of year - continuing operations	0	0	0
CASH AND CASH EQUIVALENTS, beginning of year - discontinued operations	1,715	0	0
CASH AND CASH EQUIVALENTS, end of year - discontinued operations	519	1,715	0
Eliminations [Member]
Net cash provided by operating activities - continuing operations	0	0	0
Net cash used in investing activities - continuing operations	308,558	300,789	198,644
Net cash provided by financing activities - continuing operations	(308,558)	(300,789)	(198,644)
Net increase (decrease) in cash and cash equivalents from continuing operations	0	0	0
Net increase (decrease) in cash and cash equivalents from discontinued operations	0		0
CASH AND CASH EQUIVALENTS, beginning of year - continuing operations	0	0	0
CASH AND CASH EQUIVALENTS, end of year - continuing operations	0	0	0
CASH AND CASH EQUIVALENTS, beginning of year - discontinued operations	0	0	0
CASH AND CASH EQUIVALENTS, end of year - discontinued operations	$ 0	$ 0	$ 0