Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Asset and liabilities recorded at fair value

The respective fair values measured on a recurring basis as of June 30, 2013 and December 31, 2012, respectively, were as follows:

	As of June 30, 2013
	Level 1		Level 2		Total
	(In thousands)
Assets:
Interest rate derivative financial instruments	$	—	$	2,785	$	2,785
Debt securities:
Demand obligations	$	—	$	60	$	60
Total	$	—	$	2,845	$	2,845
Liabilities:
Interest rate derivative financial instruments	$	—	$	28,116	$	28,116
Total	$	—	$	28,116	$	28,116

	As of December 31, 2012
	Level 1		Level 2		Total
	(In thousands)
Assets:
Debt securities:
Demand obligations	$	—	$	616	$	616
Total	$	—	$	616	$	616
Liabilities:
Interest rate derivative financial instruments	$	—	$	43,089	$	43,089
Total	$	—	$	43,089	$	43,089