Debt - Additional Information (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2016 USD ($) instrument	Sep. 30, 2012 USD ($) instrument	Jun. 24, 2012 USD ($) instrument
Amortization expense
Amortization expense	$ 163	$ 0	$ 200
Interest Rate Swap
Interest rate swap
Number of interest rate derivatives held | instrument				3	4	4
Amount of swap agreement				$ 50,000	$ 25,000	$ 50,000