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Fair Value of Financial Instruments
6 Months Ended
Jun. 30, 2014
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments
Note 6 – Fair Value of Financial Instruments
The Company’s financial instruments include cash and cash equivalents, accounts and notes receivable, cash collateral deposited with insurance carriers, life insurance assets, cost and equity method investments, deferred compensation plan assets and liabilities, accounts payable and other current liabilities, acquisition-related contingent consideration and debt obligations.
Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value guidance establishes a valuation hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are:
Level 1 - Quoted market prices in active markets for identical assets or liabilities.
Level 2 - Observable market based inputs or other observable inputs.
Level 3 - Significant unobservable inputs that cannot be corroborated by observable market data. These values are generally determined using valuation models incorporating management’s estimates of market participant assumptions.
Assets and Liabilities Measured at Fair Value on a Recurring Basis
As of June 30, 2014, financial instruments required to be measured at fair value on a recurring basis consisted primarily of acquisition-related contingent consideration. The fair value hierarchy requires the use of observable market data when available. In instances in which the inputs used to measure fair value fall into different levels of the fair value hierarchy, the fair value measurement classification below has been determined based on the lowest level input that is significant to the fair value measurement in its entirety.  Management’s assessment of the significance of a particular item to the fair value measurement in its entirety requires judgment, including the consideration of inputs specific to the asset or liability. Acquisition-related contingent consideration measured at fair value on a recurring basis represents the estimated fair value of additional future earn-outs payable for acquisitions of businesses that closed after January 1, 2009, in accordance with U.S. GAAP ("141R contingent consideration"). The fair value of the Company's 141R contingent consideration, which was determined using Level 3 inputs, totaled $152.4 million and $165.4 million, respectively, as of June 30, 2014 and December 31, 2013. The fair value of 141R contingent consideration is based on management’s estimates and entity-specific assumptions and is evaluated on an on-going basis.
Additions to 141R contingent consideration from new acquisitions totaled $24.9 million and $33.6 million for the three and six month periods ended June 30, 2014, respectively, and totaled $26.7 million for both the three and six month periods ended June 30, 2013. The Company paid approximately $47.0 million in connection with 141R contingent consideration for both the three and six month periods ended June 30, 2014, and paid approximately $2.0 million and $2.7 million for the three and six month periods ended June 30, 2013, respectively. Foreign currency translation losses associated with 141R contingent consideration included in other comprehensive income totaled $1.7 million and $0.4 million for the three and six month periods ended June 30, 2014, respectively. Foreign currency translation gains associated with 141R contingent consideration included in other comprehensive income totaled $1.4 million and $1.8 million for the three and six month periods ended June 30, 2013, respectively.
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Assets and liabilities recognized or disclosed at fair value on a non-recurring basis, which are initially measured at fair value, and are subsequently remeasured in the event of an impairment or other measurement event, if applicable, include items such as cost and equity method investments, goodwill, other intangible assets, long-lived assets and debt.

Carrying amounts and estimated fair values of selected financial instruments measured on a non-recurring basis as of the dates indicated were as follows (in millions):
 
June 30, 2014
 
December 31, 2013
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
4.875% Senior Notes
$
400.0

 
$
390.0

 
$
400.0

 
$
380.0

2009 Convertible Notes
$
3.0

 
$
6.0

 
$
12.6

 
$
26.6

2011 Convertible Notes
$
95.7

 
$
193.9

 
$
198.3

 
$
428.3


The estimated fair values of the Company’s 4.875% Senior Notes, 2009 Convertible Notes and 2011 Convertible Notes are based on quoted market prices, a Level 1 input. The Company's 4.0% Convertible Notes, composed of $105.3 million of 2011 4.0% Notes and $9.6 million of 2009 4.0% Notes, matured and were converted in June 2014. See Note 9 - Debt.
The Company accounts for certain investments using the cost or equity method of accounting. These investments had aggregate values of $19.3 million and $15.8 million as of June 30, 2014 and December 31, 2013, respectively. The fair value of the Company's cost and equity method investments is not readily available nor has the Company estimated the fair value of these investments. The Company is not aware of any identified events or changes in circumstance that would have a significant adverse effect on the carrying value of any of its cost or equity method investments as of June 30, 2014 and December 31, 2013.