Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
Sep. 30, 2011	Sep. 30, 2012
Statement of Cash Flows [Abstract]
Shares of common stock received in connection with acquisition of business	14,334
Reclassified escrow receivable		$ 9.9

- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

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