Fair Value Measurements (Tables)

9 Months Ended

Dec. 31, 2017

Financial Instruments, Owned, at Fair Value [Abstract]

Schedule of financial assets and liabilities accounted for at fair value and classified by level within the fair value hierarchy

The following table presents the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis, excluding assets related to the Company’s defined benefit pension plans, classified by the level within the fair value hierarchy (in thousands): 

	December 31, 2017						March 31, 2017
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Assets:
Cash equivalents	$	402,983	$	—	$	—	$	448,742	$	—	$	—
Trading investments for deferred compensation plan included in other assets:
Money market funds	$	4,229	$	—	$	—	$	2,813	$	—	$	—
Mutual funds	13,769		—		—		12,230		—		—
Total of trading investments for deferred compensation plan	$	17,998	$	—	$	—	$	15,043	$	—	$	—
Currency exchange derivative assets included in other current assets	$	—	$	235	$	—	$	—	$	48	$	—
Liabilities:
Acquisition-related contingent consideration included in accrued and other current liabilities and other non-current liabilities	$	—	$	—	$	—	$	—	$	—	$	9,908
Currency exchange derivative liabilities included in accrued and other current liabilities	$	—	$	1,392	$	—	$	—	$	443	$	—

Schedule of change in fair value of contingent consideration

The following table summarizes the changes in fair value of the Company’s contingent consideration balance measured with Level 3 inputs during the three and nine months endedDecember 31, 2017 and 2016 (in thousands):

	Three Months Ended December 31,					Nine Months Ended December 31,
	2017		2016			2017			2016
Beginning of the period	$	—	$	18,000		$	9,908		$	—
Fair value of contingent consideration upon acquisition	—		—			—			18,000
Change in fair value of contingent consideration	—		(9,925		)	(4,908		)	(9,925		)
Expected payment (see below)	—		—			(5,000		)	—
End of the period	$	—	$	8,075		$	—		$	8,075