| Schedule of Earnings Per Share Reconciliation [Table Text Block] |
| | | | Year Ended December 31, | | | | | 2017 | | 2016 | | 2015 | | | | | (amounts in thousands, except share and per share data) | | | | | | | | | | | | | | | | | Basic Income (Loss) Per Share | | | | | | | | | | | Numerator | | | | | | | | | | | | Net income available to the Company - continuing operations | | $ | 233,013 | | $ | 38,065 | | $ | 29,184 | | | Preferred stock dividends | | | 2,015 | | | 1,901 | | | 752 | | | Net income available to common shareholders from | | | | | | | | | | | | continuing operations | | | 230,998 | | | 36,164 | | | 28,432 | | | Income (loss) from discontinued operations, net of tax | | | 836 | | | - | | | - | | | Net income (loss) available to common shareholders | | $ | 231,834 | | $ | 36,164 | | $ | 28,432 | | Denominator | | | | | | | | | | | | Basic weighted average shares outstanding | | | 51,392,899 | | | 38,500,495 | | | 38,083,947 | | | Net Income (Loss) Per Common Share - Basic: | | | | | | | | | | | | Net income (loss) from continuing operations per share available to common shareholders - Basic | | $ | 4.49 | | $ | 0.94 | | $ | 0.75 | | | Net income (loss) from discontinued operations per share available to common shareholders - Basic | | | 0.02 | | | - | | | - | | | Net income (loss) per share available | | | | | | | | | | | | to common shareholders - Basic | | $ | 4.51 | | $ | 0.94 | | $ | 0.75 | | | | | | | | | | | | | | Diluted Income (Loss) Per Share | | | | | | | | | | | Numerator | | | | | | | | | | | | Net income available to the Company - continuing operations | | $ | 233,013 | | $ | 38,065 | | $ | 29,184 | | | Preferred stock dividends | | | 2,015 | | | 1,901 | | | 752 | | | Net income available to common shareholders from | | | | | | | | | | | | continuing operations | | | 230,998 | | | 36,164 | | | 28,432 | | | Income (loss) from discontinued operations, net of tax | | | 836 | | | - | | | - | | | Net income (loss) available to common shareholders | | $ | 231,834 | | $ | 36,164 | | $ | 28,432 | | Denominator | | | | | | | | | | | | Basic weighted average shares outstanding | | | 51,392,899 | | | 38,500,495 | | | 38,083,947 | | | Effect of RSUs and options under the treasury stock method | | | 1,492,257 | | | 1,067,567 | | | 953,976 | | | Diluted weighted average shares outstanding | | | 52,885,156 | | | 39,568,062 | | | 39,037,923 | | | Net Income (Loss) Per Common Share - Diluted: | | | | | | | | | | | | Net income (loss) from continuing operations per share available to common shareholders - Diluted | | $ | 4.37 | | $ | 0.91 | | $ | 0.73 | | | Net income (loss) from discontinued operations per share available to common shareholders - Diluted | | | 0.02 | | | - | | | - | | | Net income (loss) per share available | | | | | | | | | | | | to common shareholders - Diluted | | $ | 4.38 | | $ | 0.91 | | $ | 0.73 |
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