Consolidated Statement of Cash Flows Statement (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 116,674	$ 106,881
Stock-based compensation	10,176	8,903
Depreciation and amortization	11,989	10,960
Gain on insurance recovery	(546)	(101)
Increase in value of life insurance policies	(1,456)	(622)
Deferred income taxes	(709)	(1,835)
Other Noncash Income (Expense)	126	597
Accounts receivable	(5,345)	(2,787)
Inventories	(6,168)	(5,160)
Prepaid expenses and other current assets	5,433	(3,489)
Other assets	(450)	(695)
Accounts payable	2,081	(5,285)
Accrued expenses	(1,939)	(8,728)
Increase (Decrease) in Deferred Revenue	2,490	(820)
Other long-term liabilities	4,145	3,075
Net cash provided by operating activities	136,501	100,894
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(17,935)	(14,894)
Payments to Acquire Intangible Assets	(2,229)	(684)
Cash (advanced)/settled for acquisition	0	1,632
Proceeds from sale of assets	697	379
Proceeds from insurance recovery	0	101
Premiums on life insurance	(1,527)	(1,288)
Net cash used in investing activities	(20,994)	(14,754)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of debt borrowings	(35,025)	(48,744)
Proceeds from debt borrowings	51,000	30,000
Proceeds from Stock Options Exercised	83	5
Excess Tax Benefit from Share-based Compensation, Financing Activities	2,353	3,466
Payments of Debt Issuance Costs	0	(7)
Payments of Dividends	(29,508)	(26,624)
Payments for Repurchase of Common Stock	(100,416)	(50,160)
Net cash used in financing activities	(111,513)	(92,064)
NET CHANGE IN CASH AND CASH EQUIVALENTS	3,994	(5,924)
CASH AND CASH EQUIVALENTS, beginning of period	$ 19,226