Description of business and basis of presentation (Tables)

9 Months Ended

Sep. 30, 2013

Summary of Carrying Values and Estimated Fair Values of Senior Convertible Notes

The following is a summary of the carrying values and estimated fair values of the 2013 notes, the Company’s 5.75% Senior Convertible Notes due 2015 (the “2015 notes”) and the 2019 notes (in millions).


	September 30, 2013				December 31, 2012
	Carrying value		Estimated fair value		Carrying value		Estimated fair value
2013 notes	$	114.9	$	114.8	$	114.4	$	81.9
2015 notes	$	98.2	$	106.0	$	97.6	$	63.2
2019 notes	$	72.9	$	75.7		—		—

Changes in Fair Value of Level 3 Forward Purchase Contract

The following roll-forward provides a summary of changes in fair value of the Company’s Level 3 forward purchase contract (in thousands):


	Three months ended September 30, 2012		Nine months ended September 30, 2012
	Forward Purchase Contract		Forward Purchase Contract
Beginning Balance	$	—	$	—
Issuance		—		1,080
Adjustments to fair value included in other income		—		12,011
Transfers to additional paid-in-capital		—		(13,091	)

Ending Balance	$	—	$	—

- Definition

Tabular disclosure of the fair value measurement of financial instruments classified in shareholders' equity using significant unobservable inputs (level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of level 3 (for example, transfers due to changes in the observability of significant inputs) by class of equity.

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