Acquisition - Additional Information (Details) $ in Thousands	Oct. 06, 2017 USD ($) payment	Sep. 30, 2018 USD ($)
Business Acquisition [Line Items]
Secured debt	$ 245,000
Cash to be paid		$ 256,000
Triage Business
Business Acquisition [Line Items]
Payments to acquire business	399,798
Secured debt	245,000
Contingent consideration	19,700
Cash payable in installments		280,000
Fair value of deferred consideration	220,550
Triage Business | Consideration A
Business Acquisition [Line Items]
Cash to be paid	16,000
Contingent consideration	$ 24,000	$ 24,000
Number of installment payments | payment	5
Amount of installment payment	$ 8,000
Triage Business | Consideration B
Business Acquisition [Line Items]
Number of installment payments | payment	6
Amount of installment payment	$ 40,000
Cash payable in installments	240,000
Triage Business | Consideration C
Business Acquisition [Line Items]
Inventory related adjustment	$ 205