Fair value measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair value measurements

Schedule of assets and liabilities that are measured at fair value on a recurring basis

The following table presents our assets and liabilities measured at fair value on a recurring basis and the levels of inputs used to measure fair value, which include derivatives designated as cash flow hedging instruments, as well as their location on our accompanying condensed consolidated balance sheets as of September 30, 2018 and December 31, 2017 (amounts in thousands):

		Estimated Fair Value
		September 30, 2018
Category	Balance Sheet Location	Level 1	Level 2		Level 3	Total
Cash flow hedges:
Interest rate swap	Interest rate swap - Asset	—	$	3,302	—	$	3,302

		Estimated Fair Value
		December 31, 2017
Category	Balance Sheet Location	Level 1	Level 2		Level 3	Total
Cash flow hedges:
Interest rate swap	Interest rate swap - Asset	—	$	773	—	$	773