CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 93,779	$ 21,414
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion	36,655	39,494
Provision for doubtful accounts	3,649	1,167
Deferred tax expense (benefit)	12,332	(37,024)
Stock-based compensation	10,591	4,024
Excess tax benefits from stock compensation	1,865	1,331
Loss on sale of assets	332	471
Impairment of goodwill	0	113,944
Impairment of long-lived assets	1,900	10,089
Restructuring charges	1,667	7,577
Changes in operating assets and liabilities:
Trade accounts receivable, net	(77,600)	(54,169)
Inventories, net	(97,458)	(73,591)
Prepaid expenses and other current assets	(9,075)	(20,029)
Income tax receivable	20,797	20,514
Other assets	(1,267)	1,943
Trade accounts payable	103,310	72,158
Accrued expenses	62,026	32,776
Income taxes payable	28,765	25,839
Long-term liabilities	60,828	133
Net cash provided by operating activities	253,096	168,061
Cash flows from investing activities:
Purchases of property and equipment, net	(21,402)	(36,710)
Net cash used in investing activities	(21,402)	(36,710)
Cash flows from financing activities:
Proceeds from short-term borrowings	214,751	405,988
Repayments of short-term borrowings	(214,889)	(439,109)
Proceeds from issuance of stock for employee stock purchase plan	353	412
Cash paid for shares withheld for taxes	(7,716)	(6,313)
Cash paid for repurchases of common stock	(24,687)	(12,572)
Contingent consideration paid	0	(19,784)
Repayment of mortgage principal	(404)	(384)
Net cash used in financing activities	(32,592)	(71,762)
Effect of foreign currency exchange rates on cash	2,136	(9,117)
Net change in cash and cash equivalents	201,238	50,472
Cash and cash equivalents at beginning of period	291,764	245,956
Cash and cash equivalents at end of period	493,002	296,428
Cash paid (refunded) during the period for:
Income taxes refunded, net of payments ($10,261 and $9,036 as of December 31, 2017 and 2016, respectively)	(11,989)	(7,968)
Payments for Income Taxes	10,261	9,036
Interest	3,156	4,179
Non-cash investing and financing activities:
Accrued for purchases of property and equipment	1,677	3,230
Accrued for asset retirement obligations	$ 853	$ 2,350