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Unaudited Quarterly Financial Data
 12 Months Ended
Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]  
Unaudited Quarterly Financial Data
Unaudited Quarterly Financial Data
 
Summarized quarterly financial data for 2012 and 2011 are as follows (in thousands, except per share data):
 
2012
 
Quarter Ended
 
March 31
 
June 30
 
September 30
 
December 31
Total revenue
 
$
163,498

 
$
134,787

 
$
141,694

 
$
155,845

Loss from operations
 
$
(14,031
)
 
$
(11,159
)
 
$
9,023

 
$
(7,814
)
Change in fair value of derivative liabilities
 
$
1,884

 
$
3,720

 
$
(334
)
 
$
460

Interest expense, net of interest income
 
$
(12,739
)
 
$
(12,836
)
 
$
(12,699
)
 
$
(13,590
)
Net loss
 
$
(23,224
)
 
$
(27,466
)
 
$
(6,302
)
 
$
(25,969
)
Loss applicable to common stockholders
 
$
(25,650
)
 
$
(29,983
)
 
$
(8,853
)
 
$
(28,577
)
Loss per common share:
 
 
 
 
 
 

 
 

Basic and diluted
 
(1.35
)
 
(1.58
)
 
(0.46
)
 
(1.50
)
Weighted average common shares outstanding:
 
 

 
 

 
 

 
 

Basic and diluted
 
18,990

 
19,022

 
19,048

 
19,110

 
2011
 
Quarter Ended
 
March 31
 
June 30
 
September 30
 
December 31
Total revenue
 
$
187,637

 
$
145,548

 
$
206,052

 
$
224,492

Loss from operations
 
$
(21,484
)
 
$
(27,950
)
 
$
(52,102
)
 
$
(106,762
)
Change in fair value of derivative liabilities
 
$
4,443

 
$
4,529

 
$
22,409

 
$
1,919

Interest expense, net of interest income
 
$
(11,149
)
 
$
(12,941
)
 
$
(10,951
)
 
$
(12,499
)
Net loss
 
$
(28,771
)
 
$
(39,436
)
 
$
(42,105
)
 
$
(111,741
)
Loss applicable to common stockholders
 
$
(30,974
)
 
$
(41,707
)
 
$
(44,438
)
 
$
(114,132
)
Loss per common share:
 
 

 
 

 
 

 
 

Basic and diluted
 
(1.74
)
 
(2.34
)
 
(2.44
)
 
(6.03
)
Weighted average common shares outstanding:
 
 

 
 

 
 

 
 

Basic and diluted
 
17,824

 
17,838

 
18,225

 
18,943