CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Net income (loss)	$ 48,124	$ (7,973)
Reconciliation of net income (loss) to net cash (used in) provided by operating activities:
Depreciation, amortization, and accretion	9,971	9,276
Amortization on cloud computing arrangements	377	84
Bad debt (benefit) expense	(2,454)	2,664
Deferred tax benefit	(4,002)	(14)
Stock-based compensation	5,558	3,687
Loss (gain) on disposal of long lived assets	5	(22)
Impairment of operating lease assets and other long-lived assets	0	2,680
Gain on settlement of asset retirement obligations	(10)	(38)
Changes in operating assets and liabilities:
Trade accounts receivable, net	(633)	47,709
Inventories, net	(179,463)	(123,355)
Prepaid expenses and other current assets	(25,375)	(2,895)
Income tax receivable	2,472	(6,852)
Net operating lease assets and liabilities	6,645	(1,051)
Other assets	(26,451)	(1,357)
Trade accounts payable	152,144	106,203
Other accrued expenses	(34,418)	(12,091)
Income taxes payable	4,048	1,558
Other long-term liabilities	7,130	2,956
Net cash (used in) provided by operating activities	(36,332)	21,169
INVESTING ACTIVITIES
Purchases of property and equipment	(15,515)	(9,253)
Proceeds from sales of property and equipment	0	41
Net cash used in investing activities	(15,515)	(9,212)
FINANCING ACTIVITIES
Proceeds from exercise of stock options	69	247
Repurchases of common stock	(82,166)	0
Cash paid for shares withheld for taxes	(85)	(90)
Repayments of mortgage principal	0	(154)
Net cash (used in) provided by financing activities	(82,182)	3
Effect of foreign currency exchange rates on cash and cash equivalents	1,380	545
Net change in cash and cash equivalents	(132,649)	12,505
Cash and cash equivalents at beginning of period	1,089,361	649,436
Cash and cash equivalents at end of period	956,712	661,941
Cash paid during the period
Income taxes, net of refunds of $0 and $797, as of June 30, 2021 and 2020, respectively	10,811	4,216
Interest	493	756
Operating leases	14,055	14,185
Non-cash investing activities
Accrued for purchases of property and equipment	2,510	514
Accrued for asset retirement obligations	3,288	0
Leasehold improvements acquired through tenant allowances	$ 4,061	$ 0