Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets
Amortization and impairment of intangible assets	$ 11,471	$ 13,615
Nonvested stock-based compensation	5,194	3,645
Deferred rent obligations	0	4,899
Operating lease liability	45,600
Uniform capitalization adjustment to inventory	4,322	3,965
Bad debt allowance and other reserves	14,243	11,932
Accrued bonuses	6,187	7,350
Foreign currency translation	645	670
Net operating loss carry-forwards, net of valuation allowances	2,071	1,002
Other	1,372	1,445
Gross deferred tax assets	91,105	48,523
Valuation allowances	(1,519)	(195)
Total	89,586	48,328
Deferred tax liabilities
Prepaid expenses	(4,252)	(3,379)
Operating lease asset	(41,276)
Depreciation of property and equipment	(15,825)	(14,079)
Total	(61,353)	(17,458)
Deferred tax assets, net	$ 28,233	$ 30,870