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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2018
Fair Value Disclosures [Abstract]  
Assets and Liabilities Recorded at Fair Value
Asset and liabilities recorded at fair value, within Level 2 of the hierarchy framework, within the Consolidated Balance Sheets as of December 31, 2018 and 2017, respectively, were as follows (in thousands):
 
As of December 31,
 
2018
 
2017
Assets:
 
 
 
Investments
$
2,788

 
$
844

Demand obligations
13

 
13

Interest rate derivative financial instruments
13,576

 
9,501

Total
$
16,377

 
$
10,358

Liabilities:
 
 
 
Interest rate derivative financial instruments
$
1,811

 
$
10,579

Total
$
1,811

 
$
10,579