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Net Income (Loss) per Share - Additional Information (Details) - $ / shares | Dec. 15, 2016 | Dec. 31, 2016 | Dec. 31, 2013 | Nov. 27, 2013
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Settlement of tangible equity units, Shares | 7,857,000 |  |  |
6% Tangible Equity Units |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate percentage |  |  | 6.00% | 6.00%
Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Exercise price of unit |  | $ 24.49 |  |
Maximum | 6% Tangible Equity Units |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Settlement of tangible equity units, Shares | 7,857,000 |  |  |

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