CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows From Operating Activities:
Net income	$ 144,595	$ 152,624	$ 99,365
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Net loss from discontinued operations	0	771	0
Depreciation	21,547	20,946	22,463
Amortization of intangibles	51,796	52,969	45,302
Asset impairment charges	1,196	0	24,900
Amortization of contract acquisition costs	16,659	19,745	24,550
Deferred income taxes	9,350	20,362	12,039
Employee share-based compensation expense	5,733	6,150	6,663
Loss (gain) on early debt extinguishment	6,995	0	(9,834)
Other non-cash items, net	10,612	12,802	15,111
Changes in assets and liabilities, net of effects of acquisitions and discontinued operations:
Trade accounts receivable	(6,648)	(3,962)	(1,481)
Inventories and supplies	(398)	(470)	2,793
Other current assets	(1,538)	1,864	(2,109)
Non-current assets	2,261	928	5,403
Accounts payable	3,460	(5,193)	1,868
Contract acquisition payments	(12,190)	(22,087)	(29,250)
Other accrued and non-current liabilities	(18,063)	(44,834)	(11,345)
Net cash provided by operating activities of continuing operations	235,367	212,615	206,438
Cash Flows From Investing Activities:
Purchases of capital assets	(35,506)	(43,932)	(44,266)
Payments for acquisitions, net of cash acquired	(85,641)	(98,621)	(30,825)
Payments on company-owned life insurance policies	(6,383)	0	0
Loans to distributors	(5,175)	0	0
Purchases of customer lists	0	(265)	(1,639)
Purchases of marketable securities	(18)	(14)	(4,581)
Proceeds from sales of marketable securities	0	1,970	914
Proceeds from company-owned life insurance policies	0	6,143	0
Other	938	(1,451)	(1,391)
Net cash used by investing activities of continuing operations	(131,785)	(136,170)	(81,788)
Cash Flows From Financing Activities:
Net payments on short-term debt	(7,000)	(19,000)	(52,000)
Payments on long-term debt, including costs of debt reacquisition	(215,030)	0	(22,627)
Proceeds from issuing long-term debt	200,000	0	0
Payments for debt issue costs	(3,513)	(2,361)	0
Change in book overdrafts	(136)	(693)	(3,360)
Proceeds from issuing shares under employee plans	7,671	3,267	1,972
Excess tax benefit from share-based employee awards	1,052	680	68
Payments for common shares repurchased	(23,620)	(2,999)	(1,319)
Cash dividends paid to shareholders	(51,126)	(51,435)	(51,279)
Net cash used by financing activities of continuing operations	(91,702)	(72,541)	(128,545)
Effect Of Exchange Rate Change On Cash	(576)	690	1,594
Cash Used By Operating Activities Of Discontinued Operations	0	0	(470)
Cash Used By Investing Activities Of Discontinued Operations	0	0	(30)
Net Change In Cash And Cash Equivalents	11,304	4,594	(2,801)
Cash And Cash Equivalents: Beginning Of Year	17,383	12,789	15,590
Cash And Cash Equivalents: End Of Year	$ 28,687	$ 17,383	$ 12,789