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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2014
Fair Value Disclosures [Abstract]  
Asset and liabilities recorded at fair value
The respective fair values measured on a recurring basis as of June 30, 2014 and December 31, 2013, respectively, were as follows:
 
 
As of June 30, 2014
 
 
Level 1
 
Level 2
 
Total
 
 
(In thousands)
Assets:
 
 
 
 
 
 
       Interest rate derivative financial instruments
 
$

 
$
536

 
$
536

       Debt securities:
 
 
 
 
 
 
               Demand obligations
 
$

 
$
74

 
$
74

Total
 
$

 
$
610

 
$
610

Liabilities:
 
 
 
 
 
 
Interest rate derivative financial instruments
 
$

 
$
27,271

 
$
27,271

Total
 
$

 
$
27,271

 
$
27,271

 
 
As of December 31, 2013
 
 
Level 1
 
Level 2
 
Total
 
 
(In thousands)
Assets:
 
 
 
 
 
 
       Interest rate derivative financial instruments
 
$

 
$
3,919

 
$
3,919

Total
 
$

 
$
3,919

 
$
3,919

Liabilities:
 
 
 
 
 
 
Interest rate derivative financial instruments
 
$

 
$
26,078

 
$
26,078

Total
 
$

 
$
26,078

 
$
26,078