Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements [Abstract]

Fair Value Measurement Of Assets And Liabilities On A Recurring Basis

	Fair Value Measurements at March 31, 2013
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Liabilities associated with interest rate swaps	$	98,938	$	—	$	98,938	$	—
Acquisition-related contingent consideration		3,285		—		—		3,285

	Fair Value Measurements at December 31, 2012
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Liabilities associated with interest rate swaps	$	108,090	$	—	$	108,090	$	—
Acquisition-related contingent consideration		3,455		—		—		3,455