Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2018	Apr. 01, 2018	Mar. 31, 2018
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	[1]	$ 89,775		$ 78,708
Capitalized commission costs		12,492
Commission expenses		1,589
Other Current Assets
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Capitalized commission costs		2,952
Other Noncurrent Assets
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Capitalized commission costs		9,540
ASU 2014-05
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings			$ 87,127
ASU 2014-05 | ASC 606 Transition Adjustments
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings		(9,364)	$ 8,419
Revenue, Remaining Performance Obligation, Amount		$ 422,000,000
Percentage of revenue expected to recognize as services rendered and goods delivered		9.00%
Percentage of revenue expected to recognize over next 12 months		47.00%

[1] Includes cumulative effect adjustment related to the adoption of ASC 606, as defined in Note 1. See Note 1 for additional details.