Debt (Tables)

12 Months Ended

Dec. 31, 2013

Debt

Schedule of components of interest expense incurred in connection with the entity's convertible notes

Interest expense incurred in connection with our convertible notes consisted of the following (in thousands):

	Year Ended December 31,
	2013		2012		2011
Contractual coupon rate of interest	$	2,500	$	2,500	$	1,510
Discount amortization		11,178		10,487		16,118
Interest expense—convertible notes(1)	$	13,678	$	12,987	$	17,628

(1)

Interest expense recognized in connection with our convertible notes for the year ended December 31, 2011 includes the effective interest relating to a prior issue of convertible notes that matured in October 2011 (2011 Convertible Notes). We accounted for the 2011 Convertible Notes in a manner similar to that of the 2016 Convertible Notes using an effective interest rate of 7.5 percent over the five-year term of the notes.

Schedule of information about carrying amount of convertible notes

The carrying value of our convertible notes consisted of the following (in thousands):

	As of December 31,
	2013			2012
Principal balance	$	250,000		$	250,000
Discount, net of accumulated amortization of $23,783 and $12,605		(34,155	)		(45,333	)
Carrying amount	$	215,845		$	204,667

Schedule of future maturities relating to mortgage financings

As of December 31, 2013, future maturities relating to our mortgage financings are as follows (in thousands):

Year Ended December 31,
2014	$	66,636
2015		97
2016		3,490
2017		114
2018		—
Total	$	70,337

Schedule of components of interest expense presented on the entity's consolidated statements of operations

Details of interest expense presented on our consolidated statements of operations are as follows (in thousands):

	Year Ended December 31,
	2013			2012			2011
Interest expense	$	18,117		$	17,544		$	22,209
Less: interest capitalized		(59	)		(905	)		(842	)
Total interest expense	$	18,058		$	16,639		$	21,367