Supplemental Cash Flow Disclosure (Tables)

12 Months Ended

Dec. 31, 2013

Supplemental Cash Flow Elements [Abstract]

Schedule of Depreciation and Amortization Expense

Depreciation and amortization expense is comprised of the following (in thousands):

	Year Ended December 31,
	2013		2012		2011
Depreciation and amortization from continuing operations	$	119,624	$	116,384	$	110,498
Depreciation and amortization from discontinued operations	4,923		13,102		28,394
Total depreciation and amortization expense	$	124,547	$	129,486	$	138,892