CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES
Net loss	$ (7,973)	$ (19,351)
Reconciliation of net loss to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion	9,276	10,345
Bad debt expense (benefit)	2,664	(937)
Deferred tax benefit	(14)	(1,646)
Stock-based compensation	3,687	3,473
Excess tax benefit from stock-based compensation	(15)	(580)
(Gain) Loss on disposal of property and equipment	(22)	59
Impairment of operating lease assets and other long-lived assets	2,680	0
Changes in operating assets and liabilities:
Trade accounts receivable, net	47,709	19,860
Inventories, net	(123,355)	(194,552)
Prepaid expenses and other current assets	(2,895)	(7,172)
Income tax receivable	(6,852)	(1,499)
Net operating lease assets and liabilities	(1,051)	(1,033)
Other assets	(1,273)	(547)
Trade accounts payable	106,203	175,129
Other accrued expenses	(12,091)	(8,598)
Income taxes payable	1,573	(18,625)
Long-term liabilities	2,918	(955)
Net cash provided by (used in) operating activities	21,169	(46,629)
INVESTING ACTIVITIES
Purchases of property and equipment	(9,253)	(7,393)
Proceeds from sales of property and equipment	41	227
Net cash used in investing activities	(9,212)	(7,166)
FINANCING ACTIVITIES
Proceeds from exercise of stock options	247	2,773
Repurchases of common stock	0	(35,005)
Cash paid for shares withheld for taxes	(90)	(374)
Repayments of mortgage principal	(154)	(146)
Net cash provided by (used in) financing activities	3	(32,752)
Effect of foreign currency exchange rates on cash and cash equivalents	545	(519)
Net change in cash and cash equivalents	12,505	(87,066)
Cash and cash equivalents at beginning of period	649,436	589,692
Cash and cash equivalents at end of period	661,941	502,626
Cash paid during the period
Income taxes, net of refunds of $797 and $4,293, as of June 30, 2020 and 2019, respectively	4,216	11,833
Interest	756	563
Operating leases	14,185	15,265
Non-cash investing activities
Accrued for purchases of property and equipment	$ 514	$ 1,116