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Compensation Plans Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2019
Compensation Related Costs [Abstract] |
Schedule of non-vested PSUs [Table Text Block] | A summary of the status and activity of non-vested PSUs for the nine months ended September 30, 2019, is presented in the following table:
| PSUs (1) |  | Weighted-Average Grant-Date Fair Value
Non-vested at beginning of year | 1,711,259 |  |  | $ | 20.68 |
Granted | 793,125 |  |  | $ | 12.80 |
Vested | (346,021 | ) |  | $ | 26.31 |
Forfeited | (40,999 | ) |  | $ | 17.96 |
Non-vested at end of quarter | 2,117,364 |  |  | $ | 16.86 |
____________________________________________ (1) The number of awards assumes a multiplier of one. The final number of shares of common stock issued may vary depending on the three-year performance multiplier which ranges from zero to two.
Schedule of non-vested RSUs [Table Text Block] | A summary of the status and activity of non-vested RSUs granted to employees for the nine months ended September 30, 2019, is presented in the following table:
| RSUs |  | Weighted-Average Grant-Date Fair Value
Non-vested at beginning of year | 1,243,163 |  |  | $ | 21.50 |
Granted | 978,932 |  |  | $ | 12.36 |
Vested | (466,535 | ) |  | $ | 21.93 |
Forfeited | (111,188 | ) |  | $ | 19.94 |
Non-vested at end of quarter | 1,644,372 |  |  | $ | 16.04 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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