Long-term Debt - Senior Notes - Narrative (Details) (USD $)
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3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | |||||||
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Jun. 30, 2014
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Jun. 30, 2013
|
Jun. 30, 2014
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Jun. 30, 2013
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Mar. 31, 2013
Senior Notes [Member]
5.375% Senior Notes [Member]
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Jun. 30, 2014
Senior Notes [Member]
5.375% Senior Notes [Member]
|
Feb. 28, 2013
Senior Notes [Member]
5.375% Senior Notes [Member]
|
Jun. 30, 2014
Senior Notes [Member]
5.375% Senior Notes [Member]
Level 2 Securities [Member]
|
Dec. 31, 2013
Senior Notes [Member]
5.375% Senior Notes [Member]
Level 2 Securities [Member]
|
Mar. 31, 2013
Senior Notes [Member]
8.50% Senior Notes [Member]
|
Jun. 30, 2014
Senior Notes [Member]
5.750% Senior Notes [Member]
|
Feb. 28, 2014
Senior Notes [Member]
5.750% Senior Notes [Member]
|
Jun. 30, 2014
Senior Notes [Member]
5.750% Senior Notes [Member]
Level 2 Securities [Member]
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Debt Instrument [Line Items] | |||||||||||||
Face amount | $ 500,000,000 | $ 200,000,000.0 | $ 400,000,000.0 | ||||||||||
Interest rate | 5.375% | 8.50% | 5.75% | ||||||||||
Redemption prices, percent of outstanding principal | 101.00% | 101.00% | |||||||||||
Repayments | 0 | 0 | 0 | 219,362,000 | 224,500,000 | ||||||||
Make-whole premium | 19,400,000 | ||||||||||||
Interest payable | 5,100,000 | ||||||||||||
Loss on extinguishment of debt | 0 | 0 | 0 | (25,129,000) | 25,100,000 | ||||||||
Write off of unamortized deferred financing costs | 4,200,000 | ||||||||||||
Senior notes, fair value | $ 523,800,000 | $ 506,300,000 | $ 418,000,000 |