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Earnings per Share | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | Earnings Per Share The table below presents a reconciliation between basic and diluted weighted average shares outstanding, net income available to common shareholders and basic and diluted income per share for the three and six months ended June 30, 2016 and 2015:
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(In thousands, except per share amounts) |  | 2016 |  | 2015 |  | 2016 |  | 2015
NUMERATOR |  |  |  |  |  |  |  |
Net income |  | $ | 15,916 |  |  | $ | 13,350 |  |  | $ | 25,105 |  |  | $ | 22,918 |
Preferred stock dividends |  | (1,219 | ) |  | (1,219 | ) |  | (2,438 | ) |  | (2,438 | )
Net income to common shareholders |  | 14,697 |  |  | 12,131 |  |  | 22,667 |  |  | 20,480 |
Interest on 3.25% convertible senior subordinated notes due 2017 |  | 390 |  |  | 373 |  |  | 774 |  |  | 745 |
Interest on 3.00% convertible senior subordinated notes due 2018 |  | 526 |  |  | 502 |  |  | 1,043 |  |  | 1,005 |
Diluted income available to common shareholders |  | $ | 15,613 |  |  | $ | 13,006 |  |  | $ | 24,484 |  |  | $ | 22,230 |
DENOMINATOR |  |  |  |  |  |  |  |
Basic weighted average shares outstanding |  | 24,669 |  |  | 24,531 |  |  | 24,663 |  |  | 24,523 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock option awards |  | 185 |  |  | 243 |  |  | 177 |  |  | 233 |
Deferred compensation awards |  | 138 |  |  | 164 |  |  | 130 |  |  | 161 |
3.25% convertible senior subordinated notes due 2017 |  | 2,416 |  |  | 2,416 |  |  | 2,416 |  |  | 2,416 |
3.00% convertible senior subordinated notes due 2018 |  | 2,669 |  |  | 2,669 |  |  | 2,669 |  |  | 2,669 |
Diluted weighted average shares outstanding - adjusted for assumed conversions |  | 30,077 |  |  | 30,023 |  |  | 30,055 |  |  | 30,002 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.60 |  |  | $ | 0.49 |  |  | $ | 0.92 |  |  | $ | 0.84 |
Diluted |  | $ | 0.52 |  |  | $ | 0.43 |  |  | $ | 0.81 |  |  | $ | 0.74 |
Anti-dilutive equity awards not included in the calculation of diluted earnings per common share |  | 1,261 |  |  | 1,486 |  |  | 1,301 |  |  | 1,428 |
For the three and six months ended June 30, 2016 and 2015, the effect of convertible debt was included in the diluted earnings per share calculations.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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