Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Measurements [Abstract]

Fair Value Measurement Of Assets And Liabilities On A Recurring Basis

	Fair Value Measurements at December 31, 2014
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Liabilities associated with interest rate swaps	$	54,994	$	—	$	54,994	$	—
Acquisition-related contingent consideration		—		—		—		—

	Fair Value Measurements at December 31, 2013
	Total		Level 1		Level 2		Level 3
	(In thousands)
Liabilities
Liabilities associated with interest rate swaps	$	65,578	$	—	$	65,578	$	—
Acquisition-related contingent consideration		575		—		—		575