CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net income	$ 43,965	$ 7,438
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	22,134	24,453
Loss on extinguishment of debt	445	0
Bad debt expense	2,394	4,678
Deferred tax benefit	(2,029)	(3,449)
Stock-based compensation	7,362	6,798
Employee stock purchase plan	90	68
Excess tax benefits from stock compensation	1,336	76
(Gain) loss on sale of assets	(94)	273
Impairment of intangible and other long-lived assets	0	393
Restructuring charges	295	1,518
Changes in operating assets and liabilities:
Trade accounts receivable, net	(158,883)	(152,607)
Inventories, net	(227,257)	(256,709)
Prepaid expenses and other current assets	(4,965)	(2,096)
Income tax receivable	445	16,999
Other assets	1,722	(667)
Trade accounts payable	183,638	148,894
Accrued expenses	(28,120)	11,132
Income taxes payable	(540)	5,208
Long-term liabilities	(2,675)	4,810
Net cash used in operating activities	(160,737)	(182,790)
INVESTING ACTIVITIES
Purchases of property and equipment	(14,091)	(10,158)
Proceeds from sales of property and equipment, net	68	7
Net cash used in investing activities	(14,023)	(10,151)
FINANCING ACTIVITIES
Proceeds from short-term borrowings	108,001	156,751
Repayments of short-term borrowings	(37,000)	(24,000)
Proceeds on issuance of stock for employee stock purchase plan	474	353
Cash paid for shares withheld for taxes	(4,589)	(1,871)
Cash paid for repurchases of common stock	(134,735)	0
Loan origination costs on short-term borrowings	(1,276)	0
Repayment of mortgage principal	(279)	(265)
Net cash (used in) provided by financing activities	(69,404)	130,968
Effect of foreign currency exchange rates on cash	(3,614)	795
Net change in cash and cash equivalents	(247,778)	(61,178)
Cash and cash equivalents at beginning of period	429,970	291,764
Cash and cash equivalents at end of period	182,192	230,586
Cash paid (refunded) during the period
Income taxes, net of refunds and payments of $3,730 and $4,111, as of September 30, 2018 and 2017, respectively	8,682	(14,397)
Proceeds from income tax refunds	3,730
Income tax payments		4,111
Interest	2,272	1,607
Non-cash investing and financing activities
Accrued for purchases of property and equipment	2,968	2,757
Accrued for asset retirement obligations	$ 70	$ 540