Fair Value Measurements Classes of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) (USD $) In Thousands	Sep. 30, 2011		Dec. 31, 2010
Total financial assets	$ 322,189		$ 333,709
Total financial liabilities	35,315		31,792
Level 1 [Member]
Total financial assets	310,414		321,433
Total financial liabilities	0		0
Level 1 [Member] | Interest Rate Swap [Member]
Total financial liabilities	0	[1]	0	[1]
Level 1 [Member] | Cash and Cash Equivalents [Member]
Total financial assets	132,796		198,756
Level 1 [Member] | SunTrust Acquisition Future Consideration Payments Liability [Member]
Total financial liabilities	0		0
Level 1 [Member] | Foreign Currency Forward Contract [Member]
Total financial assets	0	[2]	0	[2]
Total financial liabilities	0	[3]	0	[3]
Level 1 [Member] | Available-for-sale Equity Securities [Member]
Total financial assets	153,568	[4]	105,724	[4]
Level 1 [Member] | Trading Securities - Equity [Member]
Total financial assets	23,493	[4]	6,937	[4]
Level 1 [Member] | Trading Securities - Debt [Member]
Total financial assets	557	[4]	10,016	[4]
Level 2 [Member]
Total financial assets	11,775		12,276
Total financial liabilities	16,957		11,734
Level 2 [Member] | Interest Rate Swap [Member]
Total financial liabilities	16,776	[1]	11,734	[1]
Level 2 [Member] | Cash and Cash Equivalents [Member]
Total financial assets	0		0
Level 2 [Member] | SunTrust Acquisition Future Consideration Payments Liability [Member]
Total financial liabilities	0		0
Level 2 [Member] | Foreign Currency Forward Contract [Member]
Total financial assets	0	[2]	68	[2]
Total financial liabilities	181	[3]	0	[3]
Level 2 [Member] | Available-for-sale Equity Securities [Member]
Total financial assets	0	[4]	0	[4]
Level 2 [Member] | Trading Securities - Equity [Member]
Total financial assets	4,660	[4]	4,431	[4]
Level 2 [Member] | Trading Securities - Debt [Member]
Total financial assets	7,115	[4]	7,777	[4]
Level 3 [Member]
Total financial assets	0		0
Total financial liabilities	18,358		20,058
Level 3 [Member] | Interest Rate Swap [Member]
Total financial liabilities	0	[1]	0	[1]
Level 3 [Member] | Cash and Cash Equivalents [Member]
Total financial assets	0		0
Level 3 [Member] | SunTrust Acquisition Future Consideration Payments Liability [Member]
Total financial liabilities	18,358		20,058
Level 3 [Member] | Foreign Currency Forward Contract [Member]
Total financial assets	0	[2]	0	[2]
Total financial liabilities	0	[3]	0	[3]
Level 3 [Member] | Available-for-sale Equity Securities [Member]
Total financial assets	0	[4]	0	[4]
Level 3 [Member] | Trading Securities - Equity [Member]
Total financial assets	0	[4]	0	[4]
Level 3 [Member] | Trading Securities - Debt [Member]
Total financial assets	0	[4]	0	[4]
Interest Rate Swap [Member]
Total financial liabilities	16,776	[1]	11,734	[1]
Cash and Cash Equivalents [Member]
Total financial assets	132,796		198,756
SunTrust Acquisition Future Consideration Payments Liability [Member]
Total financial liabilities	18,358		20,058
Foreign Currency Forward Contract [Member]
Total financial assets	0	[2]	68	[2]
Total financial liabilities	181	[3]	0	[3]
Available-for-sale Equity Securities [Member]
Total financial assets	153,568	[4]	105,724	[4]
Trading Securities - Equity [Member]
Total financial assets	28,153	[4]	11,368	[4]
Trading Securities - Debt [Member]
Total financial assets	$ 7,672	[4]	$ 17,793	[4]

[1] Amount included in Receivables – other on the Consolidated Balance Sheets. Pricing is determined by interpolating a value by utilizing the spot foreign exchange rate and forward points (based on the spot rate and currency interest rate differentials), which are all inputs that are observable in active markets.

[2] Amount included in Other current liabilities on the Consolidated Balance Sheets. Pricing is determined based on a third-party, model-derived valuation in which all significant inputs are observable in active markets including the Eurodollar future rate and yields for three- and thirty-year Treasury securities. See Note (10) for more information regarding the swap.

[3] Amount included in Accounts payable and accrued expenses on the Consolidated Balance Sheets. Pricing is determined by interpolating a value by utilizing the spot foreign exchange rate and forward points (based on the spot rate and currency interest rate differentials), which are all inputs that are observable in active markets.

[4] Amount included in Investments on the Consolidated Balance Sheets.