Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Net (loss) income	$ 13,599,000	$ 13,722,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	26,873,000	17,695,000
Deferred income taxes and related valuation allowance	20,141,000	2,627,000
Net gain on sale of real estate, investments and other	(10,000)	(116,000)
Stock based compensation	4,267,000	4,027,000
Amortization of deferred financing costs and discount on debt	2,009,000	515,000
Foreign Currency Transaction Loss, before Tax	0	1,826,000
Changes in operating assets and liabilities, net of effects of business acquisitions:
Trade accounts receivable	(6,516,000)	6,909,000
Inventories	(6,456,000)	5,267,000
Prepaid expenses and other	(130,000)	8,153,000
Other assets	2,803,000	(483,000)
Trade accounts payable	389,000	(5,465,000)
Increase (Decrease) in Accrued Liabilities	5,388,000	2,082,000
Non-current liabilities	(11,114,000)	(8,239,000)
Net cash provided by (used for) operating activities	51,243,000	48,520,000
INVESTING ACTIVITIES:
Proceeds from sales of marketable securities	653,000	10,336,000
Purchases of marketable securities	(110,000)	(242,000)
Capital expenditures	(9,384,000)	(11,274,000)
Payments to Acquire Businesses, Net of Cash Acquired	0	(588,000)
Payments for Derivative Instrument, Investing Activities	0	(6,370,000)
Payments for Previous Acquisition	(14,750,000)	0
Proceeds from Sales of Assets, Investing Activities	(3,359,000)	0
Net cash provided by (used for) investing activities	(26,950,000)	(8,138,000)
FINANCING ACTIVITIES:
Proceeds from exercises of stock options	5,961,000	353,000
Net payments under lines-of-credit	0	(23,500,000)
Repayment of debt	(45,050,000)	(9,792,000)
Payments of Dividends	(2,737,000)	(2,421,000)
Other	(1,255,000)	(558,000)
Increase (Decrease) in Restricted Cash	0	(588,000)
Net cash provided by (used for) financing activities	(43,081,000)	(36,506,000)
Effect of exchange rate changes on cash	5,795,000	(3,941,000)
Net change in cash and cash equivalents	(12,993,000)	(65,000)
Cash and cash equivalents at beginning of year	77,591,000	51,603,000
Cash and cash equivalents at end of period	64,598,000	51,538,000
Supplementary cash flow data:
Interest paid	14,317,000	7,080,000
Income taxes paid (refunded), net	$ 531,000	$ 910,000