Consolidated Statement of Cash Flows Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 15,117	$ 31,042
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	5,462	5,208
Depreciation and amortization	6,847	6,566
(Increase) decrease in value of life insurance policies	(568)	(816)
Deferred income taxes	(923)	1,996
Other non-cash items	(1,334)	1,450
Changes in assets and liabilities:
Accounts receivable	23,895	36,884
Inventories	(916)	(5,937)
Prepaid expenses and other current assets	(254)	8,137
Other assets	1,109	1,043
Accounts payable	1,819	1,635
Accrued expenses	(3,222)	(10,515)
Increase (Decrease) in Deferred Revenue	170	3,768
Other long-term liabilities	(1,105)	(932)
Net cash provided by operating activities	46,097	79,529
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(2,858)	(6,869)
Patents and other intangibles	(36)	(186)
Proceeds from sale of assets	408	726
Premiums on life insurance	(532)	(647)
Net cash used in investing activities	(3,018)	(6,976)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(37,838)	(18,000)
Proceeds from debt borrowings	13,000	35,000
Excess tax benefits from stock-based compensation	(68)	(68)
Debt financing costs	0	(125)
Payments of Dividends	(23,306)	(23,940)
Repurchase of common shares	(696)	(69,633)
Net cash used in financing activities	(48,908)	(76,766)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(5,829)	(4,213)
CASH AND CASH EQUIVALENTS, beginning of period	22,494	23,350
CASH AND CASH EQUIVALENTS, end of period	$ 16,665	$ 19,137