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The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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The number of derivative instruments of a particular group held by the entity.

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The per share price of the Company's stock at which the contract holder of the freestanding contract has the right to purchase or sell the Company's stock at a future date.

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The maximum number of shares that could be issued to net share settle a contract, if applicable. If a contract does not have a fixed or determinable maximum number of shares that may be required to be issued, disclose the fact that a potentially infinite number of shares could be issued to settle the contract.

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Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

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Derivatives and Hedging Activities (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended				6 Months Ended				12 Months Ended				6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011 Secured Term Loan 2 [Member]	Jun. 30, 2011 Secured Term Loan 1 [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap [Member] Interest Expense [Member]	Jun. 30, 2010 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap [Member] Interest Expense [Member]	Jun. 30, 2011 Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Accounts Payable And Other Liabilities [Member]	Dec. 31, 2010 Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Accounts Payable And Other Liabilities [Member]	Dec. 31, 2008 Not Designated as Hedging Instrument [Member] Forward Contracts [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Forward Contracts [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Forward Contracts [Member] Other Assets [Member]	Dec. 31, 2010 Not Designated as Hedging Instrument [Member] Forward Contracts [Member] Other Assets [Member]	Jun. 30, 2011 Not Designated as Hedging Instrument [Member] Forward Contracts [Member] Change in value of forward equity commitment [Member]	Jun. 30, 2010 Not Designated as Hedging Instrument [Member] Forward Contracts [Member] Change in value of forward equity commitment [Member]	Jun. 30, 2011 Interest Rate Swap [Member]	Jun. 30, 2011 Forward Contracts [Member]
Derivative [Line Items]
Debt Instrument, Face Amount		$ 35,551	$ 25,000
Expected Amount Of Derivative Related Interest To Be Reclassified To Interest Expense Over The Next 12 Months	1,777
Forward Contract Indexed to Issuer's Equity, Shares									3,500,000
Accelerated Share Repurchases, Final Price Paid Per Share									$ 5.60
Prepayment of Derivative Instrument										15,576
Interest Rate Swap Floating Payment Rate Per Annum	2.50%
Derivative, Number of Instruments Held				1						1
Notional Amount of Derivatives				60,551						36,289
Derivative Liabilities							(4,503)	(5,280)
Derivative Assets											32,264	27,574
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net					(649)	(2,161)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net					1,425	1,439
Derivative Instruments, Gain (Loss) Recognized in Income, Net													5,548	460
Termination Value															4,709
Settlement Value Net																$ 4,024