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Exchangeable Senior Notes (Tables)
 3 Months Ended
Mar. 31, 2017
Debt Disclosure [Abstract]  
Schedule of Information about Total Carrying Amounts of Equity Components, Principal Amounts of Liability Components, Unamortized Discounts and Net Carrying Amounts for Notes
Information about the Company’s 2013 Notes and 2015 Notes, including the total carrying amounts of the equity components, the principal amounts of the liability components, the unamortized discounts and the net carrying amounts was as follows for the periods indicated:
 
March 31, 2017
 
December 31, 2016
Carrying amount of equity component - 2013 Notes
$
—

 
$
—

Carrying amount of equity component - 2015 Notes
22,597

 
22,597

Carrying amount of equity components
$
22,597

 
$
22,597

Principal amount of liability component - 2013 Notes
$
63,170

 
$
63,170

Principal amount of liability component - 2015 Notes
575,000

 
575,000

Unamortized discount - equity component - 2013 Notes
(992
)
 
(1,187
)
Unamortized discount - equity component - 2015 Notes
(16,281
)
 
(17,355
)
Unamortized cash discount - 2013 Notes
(234
)
 
(281
)
Unamortized debt issuance costs
(8,430
)
 
(9,033
)
Net carrying amount of liability components
$
612,233

 
$
610,314
Summary of Amount of Interest Cost Recognized Relating to Contractual Interest Rates and Amortization of Discounts on Liability Components of Notes
The amount of interest cost recognized relating to the contractual interest rates and the amortization of the discounts on the liability components of the Notes were as follows for the periods indicated:
 
For the Three Months Ended March 31,
 
2017
 
2016
Contractual interest
$
4,867

 
$
4,882

Amortization of discount
1,269

 
1,233

Total interest expense recognized
$
6,136

 
$
6,115
Summary of Repurchase of Debt
Information about the repurchases is as follows:
 
February 2016
Principal amount repurchased
$
19,639

Amount allocated to:
 
  Extinguishment of liability component
$
18,887

  Reacquisition of equity component
12,132

Total consideration paid for repurchase
$
31,019

Exchangeable senior notes repurchased
$
19,639

Extinguishment of liability component
(18,887
)
Discount on exchangeable senior notes
(716
)
Related debt issuance costs
(36
)
Gain/(loss) on repurchase
$
—