| Schedule of unaudited pro forma summary of financial information |
| Three Months Ended | | Six Months Ended | | June 30, | | June 30, | | 2018 | | 2017 | | 2018 | | 2017 | | (amounts in thousands except share and per share data) | | | Pro Forma | | Pro Forma | | Pro Forma | | Pro Forma | | | | | | | | | | | | | | Net revenues | $ | 372,124 | | $ | 426,728 | | $ | 674,131 | | $ | 768,622 | | Income (loss) from continuing operations | $ | 2,090 | | $ | 39,451 | | $ | (11,075) | | $ | 45,696 | | Income (loss) from discontinued operations | $ | 844 | | $ | - | | $ | 1,172 | | $ | - | | Net income (loss) available to the Company | $ | 2,934 | | $ | 39,451 | | $ | (9,903) | | $ | 45,696 | | Net income (loss) available to common shareholders | $ | 2,934 | | $ | 38,901 | | $ | (9,903) | | $ | 44,596 | | Income (loss) from continuing operations | | | | | | | | | | | | | per common share - basic | $ | 0.02 | | $ | 0.28 | | $ | (0.08) | | $ | 0.33 | | Income (loss) from discontinued operations | | | | | | | | | | | | | per common share - basic | $ | 0.01 | | $ | - | | $ | 0.01 | | $ | - | | Net income (loss) available to common shareholders | | | | | | | | | | | | | per common share - basic | $ | 0.02 | | $ | 0.28 | | $ | (0.07) | | $ | 0.32 | | Income (loss) from continuing operations | | | | | | | | | | | | | per common share - diluted | $ | 0.02 | | $ | 0.28 | | $ | (0.08) | | $ | 0.32 | | Income (loss) from discontinued operations | | | | | | | | | | | | | per common share - diluted | $ | 0.01 | | $ | - | | $ | 0.01 | | $ | - | | Net income (loss) available to common shareholders | | | | | | | | | | | | | per common share - diluted | $ | 0.02 | | $ | 0.28 | | $ | (0.07) | | $ | 0.32 | | | | | | | | | | | | | | Weighted shares outstanding basic | | 138,638,554 | | | 140,352,114 | | | 138,961,728 | | | 140,342,655 | | Weighted shares outstanding diluted | | 139,263,363 | | | 141,063,093 | | | 138,961,728 | | | 141,368,209 | | Conversion of preferred stock for dilutive purposes | | | | | | | | | | | | | under the as if method | Not applicable | | anti-dilutive | | Not applicable | | anti-dilutive |
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| Schedule Of Acquisition Valuation [Table Text Block] |
| | Preliminary Value | | | | | | | | | as of acquisition date | | | | | | | | | (as previously | | Measurement | | | | | | reported as of | | period | | | | | Description | | December 31, 2017) | | Adjustment | | As Adjusted | | | (amounts in thousands) | | | | | | | | | | | | Assets | | | | | | | | | | | Accounts receivable | | $ | 241,548 | | $ | - | | $ | 241,548 | | Prepaid sports rights and favorable sports contracts | | | 4,160 | | | - | | | 4,160 | | Prepaid expenses, deposits and other | | | 20,625 | | | 476 | | | 21,101 | | Other current assets | | | 7,350 | | | 1,741 | | | 9,091 | | Total current assets | | | 273,683 | | | 2,217 | | | 275,900 | | Land | | | 112,880 | | | - | | | 112,880 | | Land improvements | | | 3,988 | | | (2,640) | | | 1,348 | | Leasehold improvements | | | 26,255 | | | 9,774 | | | 36,029 | | Buildings | | | 19,246 | | | (5,206) | | | 14,040 | | Furniture and fixtures | | | 10,929 | | | (6,849) | | | 4,080 | | Equipment and towers | | | 76,486 | | | 4,921 | | | 81,407 | | Construction in process | | | 14,598 | | | - | | | 14,598 | | Total tangible property | | | 264,382 | | | - | | | 264,382 | | Advertiser relationships | | | 27,453 | | | - | | | 27,453 | | Radio broadcasting licenses | | | 1,880,400 | | | - | | | 1,880,400 | | Goodwill | | | 820,961 | | | (4,401) | | | 816,560 | | Assets held for sale | | | 255,650 | | | - | | | 255,650 | | Favorable leases | | | 16,580 | | | - | | | 16,580 | | Other noncurrent assets | | | 1,050 | | | 1,926 | | | 2,976 | | Total intangible and other assets | | | 3,002,094 | | | (2,475) | | | 2,999,619 | | Total assets | | $ | 3,540,159 | | $ | (258) | | $ | 3,539,901 | | Liabilities | | | | | | | | | | | Accounts payable | | $ | 36,137 | | $ | 421 | | $ | 36,558 | | Accrued expenses | | | 35,154 | | | 344 | | | 35,498 | | Accrued salaries and benefits | | | 26,324 | | | - | | | 26,324 | | Current portion of long-term debt | | | 10,600 | | | - | | | 10,600 | | Unfavorable sports liability - current portion | | | 4,803 | | | - | | | 4,803 | | Accrued interest | | | 4,529 | | | - | | | 4,529 | | Unearned revenues - current portion | | | 14,971 | | | - | | | 14,971 | | Total current liabilities | | | 132,518 | | | 765 | | | 133,283 | | Unearned revenues - non-current portion | | | 13,859 | | | - | | | 13,859 | | Unfavorable lease liability | | | 12,770 | | | - | | | 12,770 | | Unfavorable sports liability - non-current portion | | | 22,597 | | | - | | | 22,597 | | Non-current portion of long-term debt | | | 1,376,900 | | | - | | | 1,376,900 | | Deferred tax liability | | | 780,832 | | | (2,949) | | | 777,883 | | Other long-term liabilities | | | 31,835 | | | 1,926 | | | 33,761 | | Total liabilities | | $ | 2,371,311 | | $ | (258) | | $ | 2,371,053 | | Preliminary fair value of net assets acquired | | $ | 1,168,848 | | $ | - | | $ | 1,168,848 |
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