| Schedule of Quarterly Financial Information [Table Text Block] |
| Quarters Ended | | December 31 | | September 30 | | June 30 | | March 31 | | (amounts in thousands, except per share data) | | 2017 | | | | | | | | | | | | | Net revenues | $ | 246,614 | | $ | 122,299 | | | 124,970 | | $ | 99,001 | | Operating income | $ | (2,265) | | $ | 13,485 | | | 16,379 | | $ | (15,016) | | Net income (loss) available to the Company from | | | | | | | | | | | | | continuing operations | $ | 231,829 | | $ | 4,100 | | $ | 6,414 | | $ | (9,331) | | Preferred stock dividend | $ | 252 | | $ | 663 | | $ | 550 | | $ | 550 | | Net income available to common shareholders from | | | | | | | | | | | | | continuing operations | $ | 231,577 | | $ | 3,437 | | | 5,864 | | $ | (9,881) | | Income (loss) from discontinued operations, | | | | | | | | | | | | | net of income taxes | $ | 836 | | $ | - | | $ | - | | $ | - | | Net income (loss) available to common shareholders | $ | 232,413 | | $ | 3,437 | | | 5,864 | | $ | (9,881) | | Net income (loss) from continuing operations | | | | | | | | | | | | | per share - basic (1) | $ | 2.63 | | $ | 0.11 | | $ | 0.16 | | $ | (0.24) | | Net income (loss) from discontinued operations, | | | | | | | | | | | | | net of tax, per share - basic (1) | $ | 0.01 | | $ | - | | $ | - | | $ | - | | Net income (loss) available to common shareholders | | | | | | | | | | | | | per share - basic (1) | $ | 2.63 | | $ | 0.09 | | | 0.15 | | $ | (0.25) | | Weighted average common shares outstanding - basic | | 88,309 | | | 38,955 | | | 38,945 | | | 38,910 | | Net income (loss) from continuing operations | | | | | | | | | | | | | per share - diluted (1) | $ | 2.58 | | $ | 0.28 | | $ | 0.26 | | $ | 0.11 | | Net income (loss) from discontinued operations, | | | | | | | | | | | | | net of tax, per share - diluted (1) | $ | 0.01 | | $ | - | | $ | - | | $ | - | | Net income (loss) available to common shareholders | | | | | | | | | | | | | per share - diluted (1) | $ | 2.59 | | $ | 0.09 | | $ | 0.15 | | $ | (0.25) | | Weighted average common shares outstanding - diluted | | 89,887 | | | 39,728 | | | 39,656 | | | 38,910 | | Preferred stock dividends declared and paid | $ | 924 | | $ | 550 | | $ | 550 | | $ | 550 | | Common stock dividends declared and paid | $ | 12,746 | | $ | 10,713 | | $ | 2,921 | | $ | 2,916 | | | | | | | | | | | | | | Quarters Ended | | December 31 | | September 30 | | June 30 | | March 31 | | (amounts in thousands, except per share data) | | 2016 | | | | | | | | | | | | | Net revenues | $ | 124,550 | | $ | 121,641 | | $ | 121,571 | | $ | 97,009 | | Operating income | $ | 30,040 | | $ | 25,688 | | $ | 27,584 | | $ | 14,745 | | Income (loss) available to the Company from | | | | | | | | | | | | | continuing operations | $ | 11,399 | | $ | 11,420 | | $ | 10,834 | | $ | 4,412 | | Preferred stock dividend | $ | 550 | | $ | 526 | | $ | 412 | | $ | 413 | | Net income available to common shareholders from | | | | | | | | | | | | | continuing operations | $ | 10,849 | | $ | 10,894 | | $ | 10,422 | | $ | 3,999 | | Income (loss) from discontinued operations, | | | | | | | | | | | | | net of income taxes | $ | - | | $ | - | | $ | - | | $ | - | | Net income (loss) available to common shareholders | $ | 10,849 | | $ | 10,894 | | $ | 10,422 | | $ | 3,999 | | Net income (loss) from continuing operations | | | | | | | | | | | | | per share - basic (1) | $ | 0.30 | | $ | 0.30 | | $ | 0.28 | | $ | 0.11 | | Net income (loss) from discontinued operations, | | | | | | | | | | | | | net of tax, per share - basic (1) | $ | - | | $ | - | | $ | - | | $ | - | | Net income (loss) available to common shareholders | | | | | | | | | | | | | per share - basic (1) | $ | 0.28 | | $ | 0.28 | | $ | 0.27 | | $ | 0.10 | | Weighted average common shares outstanding - basic | | 38,561 | | | 38,485 | | | 38,469 | | | 38,448 | | Net income (loss) from continuing operations | | | | | | | | | | | | | per share - diluted (1) | $ | 0.28 | | $ | 0.28 | | $ | 0.26 | | $ | 0.11 | | Net income (loss) from discontinued operations, | | | | | | | | | | | | | net of tax, per share - diluted (1) | $ | - | | $ | - | | $ | - | | $ | - | | Net income (loss) available to common shareholders | | | | | | | | | | | | | per share - diluted (1) | $ | 0.27 | | $ | 0.28 | | $ | 0.26 | | $ | 0.10 | | Weighted average common shares outstanding - diluted | | 39,800 | | | 41,433 | | | 41,130 | | | 39,260 | | Preferred stock dividends declared and paid | $ | 550 | | $ | 413 | | $ | 413 | | $ | 412 | | Common stock dividends declared and paid | $ | 2,893 | | $ | 2,887 | | $ | 2,886 | | $ | - |
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| Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] |
| | Three Months | | | Ended | | Description | | March 31, 2017 | | | (amounts in thousands) (unaudited) | | | | Net revenues: | | | | | Prior to revision | | $ | 97,452 | | Revision | | | 1,549 | | As revised | | $ | 99,001 | | | | | | Station operating expenses, including | | | | | non-cash compensation expense: | | | | | Prior to revision | | $ | 75,617 | | Revision | | | 1,549 | | As revised | | $ | 77,166 |
| | Three Months Ended (unaudited) | | Year Ended | | | March 31, | | June 30, | | September 30, | | December 31, | | December 31, | | Description | | 2016 | | | (amounts in thousands) | | Net revenues: | | | | | | | | | | | | | | | | | Prior to revision | | $ | 96,103 | | $ | 120,478 | | $ | 120,457 | | $ | 123,207 | | $ | 460,245 | | Revision | | | 906 | | | 1,093 | | | 1,184 | | | 1,343 | | | 4,526 | | As revised | | $ | 97,009 | | $ | 121,571 | | $ | 121,641 | | $ | 124,550 | | $ | 464,771 | | | | | | | | | | | | | | | | | | Station operating expenses, including | | | | | | | | | | | | | | | | | non-cash compensation expense: | | | | | | | | | | | | | | | | | Prior to revision | | $ | 71,715 | | $ | 82,639 | | $ | 82,905 | | $ | 81,485 | | $ | 318,744 | | Revision | | | 906 | | | 1,093 | | | 1,184 | | | 1,343 | | | 4,526 | | As revised | | $ | 72,621 | | $ | 83,732 | | $ | 84,089 | | $ | 82,828 | | $ | 323,270 |
| | Three Months Ended (unaudited) | | Year Ended | | | March 31, | | June 30, | | September 30, | | December 31, | | December 31, | | Description | | 2015 | | | (amounts in thousands) | | Net Revenues: | | | | | | | | | | | | | | | | | Prior to revision | | $ | 78,420 | | $ | 100,592 | | $ | 114,662 | | $ | 117,704 | | $ | 411,378 | | Revision | | | 589 | | | 730 | | | 874 | | | 910 | | | 3,103 | | As revised | | $ | 79,009 | | $ | 101,322 | | $ | 115,536 | | $ | 118,614 | | $ | 414,481 | | | | | | | | | | | | | | | | | | Station operating expenses, including | | | | | | | | | | | | | | | | | non-cash compensation expense: | | | | | | | | | | | | | | | | | Prior to revision | | $ | 59,367 | | $ | 70,000 | | $ | 81,241 | | $ | 77,103 | | $ | 287,711 | | Revision | | | 589 | | | 730 | | | 874 | | | 910 | | | 3,103 | | As revised | | $ | 59,956 | | $ | 70,730 | | $ | 82,115 | | $ | 78,013 | | $ | 290,814 |
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