Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Current portion of other long-term liabilities
Operating lease liabilities	$ 20,345	$ 20,602
Interest rate swap and cap contracts	15,565		$ 396
Asset retirement obligations	5,701		6,810
Acquisition related contingent consideration	4,963		0
Deferred revenue	3,386		4,109
Other	3,184		8,951
Total current portion of other long-term liabilities	53,144	40,868	20,266
Noncurrent portion of other long-term liabilities
Acquisition related contingent consideration	11,888		38,266
Interest rate swap and cap contracts	9,723		2,894
Deferred revenue	5,589		4,319
Other	10,670		22,261
Total noncurrent portion of other long-term liabilities	$ 37,870	$ 61,390	$ 67,740