Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount of cash paid for interest during the period.

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The cash inflow from a borrowing supported by a written promise to pay an obligation.

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Senior Notes - 6.00% Senior Convertible Notes due 2020 (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended
	Jun. 23, 2015	Jun. 17, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt
Interest paid			$ 11.4	$ 2.0	$ 24.5	$ 24.0
6.00% Senior Convertible Notes Due 2020
Debt
Stated interest rate (percent)			6.00%		6.00%		6.00%
TPG Aviator, L.P. \| TPG Aviator, L.P.
Debt
Ownership percentage (percent)		43.80%
Senior Notes \| 6.00% Senior Convertible Notes Due 2020
Debt
Stated interest rate (percent)	6.00%
Aggregate principal amount	$ 80.0
Senior Notes \| 6.00% Senior Convertible Notes Due 2020 \| TPG Aviator, L.P.
Debt
Aggregate principal amount		$ 20.0
Proceeds from notes		$ 20.0
Senior Notes \| 7.50% Exchange Notes and 7.50% Notes
Debt
Interest paid	$ 1.5