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Earnings Per Share Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share [Table Text Block] | The following table sets forth the computation of basic and diluted earnings (loss) per share (EPS):
| Year Ended December 31,
| 2016 |  | 2015 |  | 2014
| (in thousands, except per share data)
Net income (loss) available to common shareholders | $ | 31,770 |  |  | $ | 12,678 |  |  | $ | (23,670 | )
Weighted average common shares outstanding - Basic | 38,207 |  |  | 38,224 |  |  | 39,184 |
Dilutive effect of stock-based awards | 436 |  |  | 282 |  |  | — |
Weighted average common shares outstanding - Diluted | 38,643 |  |  | 38,506 |  |  | 39,184 |
Earnings (loss) per common share - Basic | $ | 0.83 |  |  | $ | 0.33 |  |  | $ | (0.60 | )
Earnings (loss) per common share - Diluted | $ | 0.82 |  |  | $ | 0.33 |  |  | $ | (0.60 | )

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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://www.xbrl.org/2003/role/presentationRef -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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