Investment in and Notes Receivable from CareCentrix	3 Months Ended
Mar. 31, 2013
Note Receivable from and Investment in Entity [Abstract]
Note Receivable from and Investment in CareCentrix	Investment in and Notes Receivable from CareCentrix The Company holds a $25.0 million subordinated promissory note from CareCentrix, Inc. In connection with the sale of the Company’s ownership interest in CareCentrix Holdings on September 19, 2011, the maturity date of the note was extended to the earlier of March 19, 2017 or a sale of CareCentrix Holdings. The note bears interest at a fixed rate of 10 percent, which is payable quarterly, provided that CareCentrix remains in compliance with its senior debt covenants. Interest on the CareCentrix promissory note, which is included in interest income in the Company’s consolidated statements of comprehensive income, amounted to $0.6 million for both the first quarter of 2013 and 2012. Pursuant to the terms of the stock purchase agreement, approximately $10.6 million of the sale price due to the Company was placed into an escrow fund for future indemnification claims. In February and June 2012, approximately $0.7 million of the escrow fund was paid out to cover expenses related to an indemnified claim. On August 24, 2012, the Company received notification from CareCentrix of its election to draw seller financing from the escrow fund pursuant to the terms of the stock purchase agreement. As such, the Company reclassified its escrow receivable of approximately $9.9 million from prepaid expenses and other current assets to a seller financing note receivable from CareCentrix on the Company's consolidated balance sheet as of September 30, 2012. The seller financing note receivable, which bears interest at 18 percent, matures on the earlier of March 19, 2017 or upon the sale of CareCentrix Holdings. Interest on this note is payable quarterly, in kind, and will accrete as additional principal on the note. The Company expects to record interest income at the time of receipt as the note is part of the proposed settlement discussed below. On September 17, 2012, the Company received a formal notice of claims for indemnification from CareCentrix. In the notice, CareCentrix asserted that the total claimed amounts exceed the total amount in escrow and demanded that the entire principal amount of the seller financing note receivable be reduced to zero. In anticipation of a settlement of claims alleged by the owner of CareCentrix and working capital adjustments as set forth in the stock purchase agreement, during the fourth quarter of 2012, the Company recorded a $6.5 million adjustment to the seller financing note receivable to reflect its revised estimated fair value of $3.4 million. The Company established an investment in CareCentrix of $0.9 million for shares that it may receive as part of any settlement. The Company’s financing receivables consist of the previously described $25.0 million subordinated promissory note from CareCentrix, Inc. dated September 19, 2011 and a $3.4 million seller financing note receivable from CareCentrix, Inc. dated August 24, 2012. The Company measures impairment based on the present value of expected cash flows after considering assumptions relating to risk factors and economic conditions. On an ongoing basis, the Company assesses the credit quality based on the Company’s review of CareCentrix, Inc.’s financial position and receipt of interest payments when due. Based on the Company’s analysis, as of March 31, 2013 and December 31, 2012, the Company had no allowances for credit losses.

Investment in and Notes Receivable from CareCentrix

The Company holds a $25.0 million subordinated promissory note from CareCentrix, Inc. In connection with the sale of the Company’s ownership interest in CareCentrix Holdings on September 19, 2011, the maturity date of the note was extended to the earlier of March 19, 2017 or a sale of CareCentrix Holdings. The note bears interest at a fixed rate of 10 percent, which is payable quarterly, provided that CareCentrix remains in compliance with its senior debt covenants. Interest on the CareCentrix promissory note, which is included in interest income in the Company’s consolidated statements of comprehensive income, amounted to $0.6 million for both the first quarter of 2013 and 2012.

Pursuant to the terms of the stock purchase agreement, approximately $10.6 million of the sale price due to the Company was placed into an escrow fund for future indemnification claims. In February and June 2012, approximately $0.7 million of the escrow fund was paid out to cover expenses related to an indemnified claim.

On August 24, 2012, the Company received notification from CareCentrix of its election to draw seller financing from the escrow fund pursuant to the terms of the stock purchase agreement. As such, the Company reclassified its escrow receivable of approximately $9.9 million from prepaid expenses and other current assets to a seller financing note receivable from CareCentrix on the Company's consolidated balance sheet as of September 30, 2012. The seller financing note receivable, which bears interest at 18 percent, matures on the earlier of March 19, 2017 or upon the sale of CareCentrix Holdings. Interest on this note is payable quarterly, in kind, and will accrete as additional principal on the note. The Company expects to record interest income at the time of receipt as the note is part of the proposed settlement discussed below.

On September 17, 2012, the Company received a formal notice of claims for indemnification from CareCentrix. In the notice, CareCentrix asserted that the total claimed amounts exceed the total amount in escrow and demanded that the entire principal amount of the seller financing note receivable be reduced to zero. In anticipation of a settlement of claims alleged by the owner of CareCentrix and working capital adjustments as set forth in the stock purchase agreement, during the fourth quarter of 2012, the Company recorded a $6.5 million adjustment to the seller financing note receivable to reflect its revised estimated fair value of $3.4 million. The Company established an investment in CareCentrix of $0.9 million for shares that it may receive as part of any settlement.

The Company’s financing receivables consist of the previously described $25.0 million subordinated promissory note from CareCentrix, Inc. dated September 19, 2011 and a $3.4 million seller financing note receivable from CareCentrix, Inc. dated August 24, 2012. The Company measures impairment based on the present value of expected cash flows after considering assumptions relating to risk factors and economic conditions. On an ongoing basis, the Company assesses the credit quality based on the Company’s review of CareCentrix, Inc.’s financial position and receipt of interest payments when due. Based on the Company’s analysis, as of March 31, 2013 and December 31, 2012, the Company had no allowances for credit losses.