Consolidated Statement of Cash Flows Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 17,682	$ 15,117
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	5,723	5,462
Depreciation and amortization	6,427	6,847
Changes to value of life insurance policies	946	(568)
Deferred income taxes	6,603	(923)
Other non-cash items	571	(1,334)
Changes in assets and liabilities:
Accounts receivable	(7,525)	23,895
Inventories	(3,898)	(916)
Prepaid expenses and other current assets	(1,647)	(254)
Other assets	(1,001)	1,109
Accounts payable	4,576	1,819
Accrued expenses	(3,590)	(3,222)
Increase (Decrease) in Deferred Revenue	3,609	170
Other long-term liabilities	1,285	(1,105)
Net cash provided by operating activities	29,761	46,097
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(6,449)	(2,858)
Patents and other intangibles	(102)	(36)
Proceeds from sale of assets	324	408
Premiums on life insurance	(399)	(532)
Net cash used in investing activities	(6,626)	(3,018)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(49,000)	(37,838)
Proceeds from debt borrowings	51,000	13,000
Excess tax benefits from stock-based compensation	0	(68)
Payments of Dividends	(24,284)	(23,306)
Repurchase of common shares	(1,273)	(696)
Net cash used in financing activities	(23,557)	(48,908)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(422)	(5,829)
CASH AND CASH EQUIVALENTS, beginning of period	14,764	22,494
CASH AND CASH EQUIVALENTS, end of period	$ 14,342	$ 16,665