Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Receivables
Trade receivable sold under factoring agreement	$ 1.3	$ 0.9
Cash proceeds from sale of receivables	1.2	0.8
Administrative fees	0.1	$ 0.1
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Less unamortized deferred financing fees [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Notes payable, carrying amount	100.0		$ 100.0
Estimate of Fair Value, Fair Value Disclosure [Member] | Less unamortized deferred financing fees [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Notes payable, fair value disclosure	$ 101.0		$ 98.0