Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Asset and liabilities recorded at fair value

Assets and liabilities recorded at fair value, within Level 2 of the hierarchy framework, in the accompanying balance sheets as of June 30, 2018 and December 31, 2017, respectively, were as follows:

	As of June 30, 2018		As of December 31, 2017
	(In thousands)
Assets:
Investments	$	2,057	$	844
Demand obligations	13		13
Interest rate derivative financial instruments	18,548		9,501
Total	$	20,618	$	10,358
Liabilities:
Interest rate derivative financial instruments	$	2,279	$	10,579
Total	$	2,279	$	10,579