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

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Debt (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
Debt (Details) - USD ($) $ in Thousands	Mar. 16, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Long Term Debt
Repayments of debt		$ 73,420	$ 138,533	$ 561,428	$ 271,191
Senior Notes
Long Term Debt
Repayments of debt	$ 350,000
Stated interest rate (as a percent)	7.625%
Redemption price of debt instrument (as a percent)	103.813%
Associated premiums and related expenses recorded	$ 16,700