Cash and Cash Equivalents and Fair Value of Financial Instruments - Additional Information (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 67,192,000	$ 32,424,000	$ 54,488,000		$ 82,217,000
Foreign Exchange Forward
Cash and Cash Equivalents [Line Items]
Derivative, Notional Amount	0	0
Interest Rate Swap
Cash and Cash Equivalents [Line Items]
Derivative, Notional Amount				$ 100,000,000
Fixed Interest Rate				0.80%
Fair value of derivatives	$ 600,000	$ 1,400,000
LIBOR | Interest Rate Swap
Cash and Cash Equivalents [Line Items]
Variable Rate Floor				0.00%