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Quarterly Results of Operations - Summary of Quarterly Results of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Net revenue | $ 60,093 | $ 57,786 | $ 56,950 | $ 49,087 | $ 63,752 | $ 58,486 | $ 54,491 | $ 46,524 | $ 223,916 | $ 223,253 | $ 194,396 |
| Net income (loss) applicable to common stockholders | $ 151,093 | $ (21,384) | $ 5,073 | $ (957) | $ 7,697 | $ 7,233 | $ 2,066 | $ (3,395) | $ 133,825 | $ 13,601 | $ (8,200) |
| Net income (loss) per share, basic | $ 1.72 | $ (0.24) | $ 0.06 | $ (0.01) | $ 1.53 | $ 0.16 | $ (0.10) | ||||
| Net income (loss) per share, basic and diluted | $ 0.09 | $ 0.08 | $ 0.02 | $ (0.04) | $ 0.16 | ||||||
| Net income (loss) per share, diluted | $ 1.67 | $ (0.24) | $ 0.06 | $ (0.01) | $ 1.50 | $ 0.16 | $ (0.10) | ||||