Equity Investments (Tables)

12 Months Ended

Dec. 31, 2011

Equity Investments [Abstract]

Summarized combined financial information of entities in which Company owns equity interest

Summarized combined financial information for the unconsolidated entities in which the Company owns an equity interest is as follows (in thousands):

	December 31,
	2011		2010
Current assets	$	233,496	$	220,881
Noncurrent assets		790,125		771,646
Total assets	$	1,023,621	$	992,527
Current liabilities	$	82,687	$	83,985
Noncurrent liabilities		2,094		2,198
Members’ equity		938,672		905,006
Noncontrolling interests		168		1,338
Total liabilities and equity	$	1,023,621	$	992,527

	Year Ended December 31,
	2011		2010		2009
Net operating revenues	$	1,230,146	$	1,195,108	$	1,181,334
Operating costs and expenses	$	1,068,212	$	1,044,751	$	1,032,953
Income from continuing operations before taxes	$	162,124	$	150,640	$	148,343