Restricted Cash (Tables)

6 Months Ended

Jun. 30, 2018

Restricted Cash [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash

	As of		As of
	June 30, 2018		December 31, 2017		Included on Balance Sheet
		(in thousands)
Cash and cash equivalents	$	134,651	$	68,783
Securitization escrow accounts		24,639		32,699	Restricted cash - current asset
Payment and performance bonds		203		225	Restricted cash - current asset
Surety bonds and workers compensation		2,353		2,588	Other assets - noncurrent
Cash held in escrow for acquisitions		14,517		—	Other assets - noncurrent
Total cash, cash equivalents, and restricted cash	$	176,363	$	104,295