Derivative Instruments - Additional Information (Details) - Term Loan [Member] - Interest Rate Swap [Member] $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)
Derivative [Line Items]
Debt instrument maturity date		Sep. 07, 2025
Description of variable rate basis		one-month LIBOR
Debt Instrument, Interest Rate, Stated Percentage	2.54%	2.54%
Derivative Instrument, notional value	$ 35.5	$ 35.5
Interest rate payment description		The objective of the interest rate swap is to reduce the variability in the forecasted interest payments of the Term Loans, which is based on a one-month LIBOR rate versus a fixed interest rate of 2.54% on a notional value of $35.5 million. Under the terms of the interest rate swap agreement, we will receive quarterly variable interest payments based on the LIBOR rate and will pay interest at a fixed rate
Derivative instrument gain under fair value	$ 0.3	$ 1.1