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Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Schedule of Net Income Per Share |
| Year ended December 31,
| 2018 |  | 2017
Numerator (in millions): |  |  |
Net income (loss) | $ | (104.1 | ) |  | $ | 12.2 |
Preferred stock dividends - undeclared and cumulative | 7.8 |  |  | 6.9 |
Net income (loss) allocable to common stockholders | $ | (111.9 | ) |  | $ | 5.3 |
Denominator (in thousands): |  |  |
Average common shares outstanding - basic | 9,151 |  |  | 9,081 |
Potentially dilutive shares related to stock options and restricted stock units (a) | — |  |  | — |
Average common shares outstanding - diluted | 9,151 |  |  | 9,081 |
Net income (loss) per common share (in dollars) - basic and diluted: | $ | (12.23 | ) |  | $ | 0.58 |
(a) Common stock equivalents excluded from the diluted calculation as a result of a net loss in the period (in thousands) | 23 |  |  | — |
Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands) | 360 |  |  | 200 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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