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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2017
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 per share (EPS):
| Three Months Ended March 31,
| 2017 |  | 2016
| (in thousands, except per share data)
Net income available to common shareholders | $ | 15,845 |  |  | $ | 10,089 |
Weighted average common shares outstanding - Basic | 38,474 |  |  | 38,059 |
Dilutive effect of stock-based awards | 741 |  |  | 317 |
Weighted average common shares outstanding - Diluted | 39,215 |  |  | 38,376 |
Earnings per common share - Basic | $ | 0.41 |  |  | $ | 0.27 |
Earnings per common share - Diluted | $ | 0.40 |  |  | $ | 0.26 |

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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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