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Earnings per Share | 12 Months Ended
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Dec. 31, 2016
Loss 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 years ended December 31, 2016, 2015 and 2014:
| Year Ended December 31,
(In thousands, except per share amounts) | 2016 |  | 2015 |  | 2014
NUMERATOR |  |  |  |  |
Net income | $ | 56,609 |  |  | $ | 51,763 |  |  | $ | 50,789 |
Preferred stock dividends | (4,875 | ) |  | (4,875 | ) |  | (4,875 | )
Net income available to common shareholders | 51,734 |  |  | 46,888 |  |  | 45,914 |
Interest on 3.25% convertible senior subordinated notes due 2017 | 1,520 |  |  | 1,499 |  |  | 1,504 |
Interest on 3.00% convertible senior subordinated notes due 2018 | 2,050 |  |  | 2,021 |  |  | 2,030 |
Diluted income available to common shareholders | $ | 55,304 |  |  | $ | 50,408 |  |  | $ | 49,448 |
DENOMINATOR |  |  |  |  |
Basic weighted average shares outstanding | 24,666 |  |  | 24,575 |  |  | 24,463 |
Effect of dilutive securities: |  |  |  |  |
Stock option awards | 216 |  |  | 237 |  |  | 222 |
Deferred compensation awards | 149 |  |  | 150 |  |  | 142 |
3.25% convertible senior subordinated notes due 2017 | 2,416 |  |  | 2,416 |  |  | 2,416 |
3.00% convertible senior subordinated notes due 2018 | 2,669 |  |  | 2,669 |  |  | 2,669 |
Diluted weighted average shares outstanding - adjusted for assumed conversions | 30,116 |  |  | 30,047 |  |  | 29,912 |
Earnings per common share |  |  |  |  |
Basic | $ | 2.10 |  |  | $ | 1.91 |  |  | $ | 1.88 |
Diluted | $ | 1.84 |  |  | $ | 1.68 |  |  | $ | 1.65 |
Anti-dilutive equity awards not included in the calculation of diluted earnings per common share | 1,273 |  |  | 1,447 |  |  | 1,250 |
The Company declared and paid a quarterly cash dividend of $609.375 per share on its 2,000 outstanding Series A Preferred Shares in each quarter of 2016, 2015 and 2014, for an aggregate dividend payment of $4.9 million for each of the years ended December 31, 2016, 2015 and 2014. For the years ended December 31, 2016, 2015 and 2014, 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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