Statement of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 63,859	$ 114,932	$ 258,626
Adjustments to reconcile income to net cash provided by operating activities:
Share-based Compensation	22,079	21,279	20,470
Depreciation and amortization	26,872	27,457	26,696
Debt issuance costs amortization and finance charges	501	702	445
(Increase) decrease in value of life insurance policies	(824)	909	(1,581)
Increase (Decrease) in Deferred Income Taxes	(14,385)	(107)	4,682
Asset Impairment Charges	0	5,199	0
Provision for Doubtful Accounts	(18)	2,592	1,243
Other Noncash Income (Expense)	(1,399)	(860)	(466)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	31,584	49,261	3,486
Inventories	6,219	3,049	2,894
Prepaid expenses and other current assets	2,657	7,744	(10,088)
Increase (Decrease) in Deferred Revenue	1,589	3,092	121
Other assets	340	2,652	680
Accounts payable	(1,036)	(13,353)	(3,021)
Accrued expenses	(6,738)	(9,723)	(2,611)
Other long-term liabilities	587	4,275	1,873
Net cash provided by operating activities	131,887	219,100	303,449
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(11,356)	(22,797)	(36,586)
Patents and other intangibles	(348)	(1,460)	(854)
Acquisitions, net of cash acquired	(1,242)	(13,774)	(1,200)
Proceeds from sale of assets	740	1,320	884
Premiums on life insurance	(2,515)	(2,943)	(4,310)
Net cash used in investing activities	(14,721)	(39,654)	(42,066)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(316,244)	(139,656)	(128,162)
Proceeds from debt borrowings	99,000	215,000	217,000
Excess tax benefits from stock-based payments	(1,162)	(175)	3,020
Debt financing costs	0	(387)	(1,128)
Non-controlling interest - dividend	(1,386)	(1,140)	(394)
Dividends paid	(95,145)	(94,235)	(89,089)
Repurchase of common shares	(7,161)	(159,709)	(264,368)
Proceeds from Issuance of Common Stock	197,202	0	0
Net cash used in financing activities	(124,896)	(180,302)	(263,121)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(7,730)	(856)	(1,738)
Cash and Cash Equivalents, at Carrying Value	14,764	22,494	23,350
Cash payments for interest	11,248	12,313	10,272
Cash payments for income taxes	12,181	35,523	79,644
Non-cash investing and financing activities:
Financed capital expenditures	1,627	483	1,009
Insurance premium financed	$ 0	$ 2,228	$ 0