Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 28,504	$ 17,236	$ 16,954
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,477	8,308	7,878
Accretion of investment discount	(196)	(329)	(234)
Provision for accounts receivable allowances	5,188	2,712	2,143
Deferred tax (benefit) provision	(1,608)	1,868	1,666
Gain on bargain purchases	(19,990)	0	0
Loss (gain) on sale or disposal of assets	88	(120)	(16)
Share-based compensation expense	1,653	1,654	2,038
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(6,095)	(4,268)	1,593
Inventories	(30)	(4,674)	(2,903)
Prepaid expenses and other assets	2,506	(4,627)	1,248
Accounts payable	(1,153)	539	2,253
Accrued expenses and long-term obligations	(2,473)	(3,176)	371
Net cash provided by operating activities	14,871	15,123	32,991
Cash flows from investing activities:
Maturities of investment securities	60,000	95,000	30,000
Purchase of held-to-maturity investment securities	(19,928)	(84,632)	(69,749)
Purchase of businesses, net of cash received of $2,778 in 2015	(15,039)	(19,545)	(15,146)
Purchase of property, plant and equipment	(4,957)	(6,411)	(3,924)
Purchase of intangibles	(100)	0	0
Proceeds from sale of assets	311	1,530	26
Net cash provided by (used for) investing activities	20,287	(14,058)	(58,793)
Cash flows from financing activities:
Payments on long-term debt	(65)	0	0
Payment of financing transaction costs	0	0	(112)
Dividends paid	(7,273)	(6,764)	(5,878)
Purchase of treasury stock	0	(11,274)	0
Proceeds from exercise of stock options	123	770	46
Payments for tax withholding on net restricted stock settlements	(527)	(520)	(293)
Tax effect of stock awards	286	221	268
Net cash used for financing activities	(7,456)	(17,567)	(5,969)
Effect of exchange rate changes on cash	64	0	0
Net increase (decrease) in cash and cash equivalents	27,766	(16,502)	(31,771)
Cash and cash equivalents at beginning of period	19,927	36,429	68,200
Cash and cash equivalents at end of period	$ 47,693	$ 19,927	$ 36,429