Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net income	$ 8,984,000	$ 19,579,000	$ 27,190,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,162,000	20,531,000	14,562,000
Deferred income taxes and related valuation allowance	489,000	7,336,000	2,074,000
Gain on sale of real estate/investments and other	14,000	34,000	(1,897,000)
Payments of Debt Extinguishment Costs	1,303,000	0	8,567,000
Environmental Expense and Liabilities	0	429,000	0
Amortization of deferred financing costs and discount on debt	1,015,000	600,000	805,000
Stock-based compensation	5,914,000	4,063,000	3,895,000
Amortization of Acquisition Costs	8,852,000	0	0
Insured Event, Gain (Loss)	1,590,000	0	0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	1,125,000
Impairment of intangible asset		0
Changes in operating assets and liabilities, net of effects of business acquisitions and divestitures:
Trade accounts receivable	(785,000)	12,409,000	8,302,000
Inventories	8,173,000	2,483,000	(9,080,000)
Prepaid expenses and other	6,121,000	(375,000)	(3,192,000)
Other assets	(3,044,000)	3,179,000	(572,000)
Trade accounts payable	1,002,000	(5,308,000)	1,084,000
Accrued liabilities	(2,380,000)	(5,799,000)	(872,000)
Non-current liabilities	(3,085,000)	(6,516,000)	(12,612,000)
Net cash provided by operating activities	60,450,000	52,645,000	38,254,000
Investing activities:
Proceeds from sales of marketable securities	12,336,000	5,869,000	6,919,000
Purchases of marketable securities	(1,571,000)	(4,311,000)	(3,689,000)
Capital expenditures	(14,368,000)	(22,320,000)	(17,243,000)
Payments for Derivative Instrument, Investing Activities	(1,590,000)	0	0
Other	0	0	(74,000)
Purchases of businesses, net of cash acquired		(182,467,000)	(19,992,000)
Net cash used for investing activities	(224,039,000)	(203,229,000)	(34,079,000)
Financing activities:
Proceeds from the issuance of common stock	50,439,000	242,000	1,607,000
Dividends, Cash	(3,326,000)	(3,212,000)	(3,192,000)
Early Repayment of Subordinated Debt	0	0	(5,907,000)
Increase (Decrease) in Restricted Cash	(588,000)	0	(5,431,000)
Net borrowings (repayments) under lines of credit	(155,000,000)	154,057,000	0
Repayment of debt	(125,730,000)	(13,187,000)	(157,203,000)
Proceeds from (Repayments of) Other Long-term Debt	445,000,000	0	124,423,000
Fees related to debt and equity offerings	(19,409,000)	0	(1,825,000)
Other	(1,265,000)	(897,000)	(859,000)
Net cash provided by (used for) financing activities	190,121,000	137,003,000	(48,387,000)
Effect of exchange rate changes on cash	(544,000)	2,128,000	(5,041,000)
Net change in cash and cash equivalents	25,988,000	(11,453,000)	(49,253,000)
Cash and cash equivalents at beginning of year	51,603,000	63,056,000	112,309,000
Cash and cash equivalents at end of year	77,591,000	51,603,000	63,056,000
Supplementary cash flows data:
Interest paid	10,633,000	7,649,000	13,750,000
Income taxes paid, net of refunds	1,893,000	4,175,000	10,215,000
Property, plant and equipment purchases included in trade accounts payable	0	1,638,000	1,216,000
Decrease in Restricted Cash	0	$ 822,000	$ 0
STAHL and Ergomatic [Member]
Investing activities:
Purchases of businesses, net of cash acquired	$ (218,846,000)