Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows from Operating Activities:
Net income	$ 92,005	$ 88,533
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	18,499	16,904
Other amortization	49	58
Provision for deferred income taxes	(451)	(1,506)
Stock-based compensation	11,370	12,949
Loss on disposition of property	533	0
Loss on investment in affiliate	842	972
Impairment of investment in affiliate	0	245
Changes in assets and liabilities:
Accounts receivable	(5,586)	(10,067)
Marketing fee receivable	(108)	(3,722)
Income taxes receivable	(1,222)	(3,723)
Prepaid expenses	(5,604)	(4,088)
Other current assets	1,216	3
Accounts payable and accrued expenses	(4,844)	(2,211)
Marketing fee payable	13	3,650
Deferred revenue and other liabilities	10,723	15,511
Post-retirement benefit obligations	(14)	(18)
Income tax liability	3,815	3,370
Net Cash Flows provided by Operating Activities	121,236	116,860
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital and other assets expenditures	(28,326)	(13,072)
Investment in Affiliates	(973)	(1,120)
Other	3	8
Net Cash Flows used in Investing Activities	(29,296)	(14,184)
Payment of quarterly dividends	(31,307)	(26,604)
Excess tax benefit from stock-based compensation	3,531	2,206
Purchase of unrestricted stock from employees	(8,291)	(6,109)
Purchase of unrestricted common stock under announced program	(88,272)	0
Payment of special dividend	(43,831)	0
Net Cash Flows used in Financing Activities	(168,170)	(30,507)
Net Increase (Decrease) in Cash and Cash Equivalents	(76,230)	72,169
Cash and Cash Equivalents at Beginning of Period	221,341	135,597
Cash and Cash Equivalents at End of Period	145,111	207,766
Supplemental Disclosure of Cash Flow Information
Cash paid for income taxes	53,530	54,730
Non-cash activities:
Unpaid liability to acquire equipment and software	$ 2,745	$ 1,929