Cash and Cash Equivalents (Tables)

3 Months Ended

Mar. 31, 2017

Cash and Cash Equivalents [Abstract]

Cash and cash equivalents

The carrying values of the Company's cash and cash equivalents are as follows:

	As of March 31,		As of December 31,
	2017		2016
	(in thousands, unaudited)
Cash	$	45,234	$	85,047
Cash equivalents	2,503		9,013
Restricted cash - letters of credit	4,256		4,253
Total cash and cash equivalents	$	51,993	$	98,313