Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Liabilities:
Contingent consideration — current	$ 407	$ 433
Active markets for identical assets or liabilities (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current	0
Quoted prices in similar instruments and observable inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current	0
Active markets for unobservable inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current	853
Other Noncurrent Assets [Member] | Active markets for identical assets or liabilities (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current		0
Other Noncurrent Assets [Member] | Quoted prices in similar instruments and observable inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current		0
Other Noncurrent Assets [Member] | Active markets for unobservable inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current		809
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current	$ 853
Estimate of Fair Value Measurement [Member] | Other Noncurrent Assets [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Corporate-owned life insurance — non-current		$ 809