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Quarterly Financial Information (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information (Unaudited) | Quarterly Financial Information (Unaudited) The following is a summary of our quarterly results of operations for the years ended December 31, 2018 and 2017:
|  | For the Three Months Ended
(In millions except per share data) |  | December 31 |  | September 30 |  | June 30 |  | March 31
Year ended December 31, 2018 |  |  |  |  |  |  |  |
Revenues |  | $ | 338.0 |  |  | $ | 266.7 |  |  | $ | 242.5 |  |  | $ | 184.4 |
Gross profit |  | 222.8 |  |  | 168.6 |  |  | 153.6 |  |  | 118.9 |
Total operating expenses |  | 387.4 |  |  | 154.7 |  |  | 158.5 |  |  | 149.6 |
Net income (loss) |  | (179.7 | ) |  | 46.6 |  |  | 30.2 |  |  | (24.2 | )
Basic net income (loss) per share (a) |  | $ | (2.03 | ) |  | $ | 0.53 |  |  | $ | 0.34 |  |  | $ | (0.28 | )
Diluted net income (loss) per share (a) |  | $ | (2.03 | ) |  | $ | 0.52 |  |  | $ | 0.34 |  |  | $ | (0.28 | )
Year ended December 31, 2017 |  |  |  |  |  |  |  |
Revenues |  | $ | 221.0 |  |  | $ | 184.6 |  |  | $ | 170.6 |  |  | $ | 142.3 |
Gross profit |  | 153.5 |  |  | 127.0 |  |  | 117.5 |  |  | 94.1 |
Total operating expenses |  | 141.5 |  |  | 127.5 |  |  | 131.1 |  |  | 134.5 |
Net income (loss) |  | (9.4 | ) |  | (2.0 | ) |  | 2.9 |  |  | (41.7 | )
Basic net income (loss) per share (a) |  | $ | (0.11 | ) |  | $ | (0.02 | ) |  | $ | 0.03 |  |  | $ | (0.49 | )
Diluted net income (loss) per share (a) |  | $ | (0.11 | ) |  | $ | (0.02 | ) |  | $ | 0.03 |  |  | $ | (0.49 | )
(a) Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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