| In millions, except per share items | Dec-31-14 | Dec-29-13 | Dec-30-12 | Dec-25-11 | Dec-26-10 | Dec-27-09 | Dec-28-08 | Dec-30-07 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Continuing operations: | | | | | | | | |
| Revenue: | | | | | | | | |
| Total revenue | 428.4 | 397.3 | 393.1 | 351.5 | 376.8 | 365.5 | 451.7 | 582.7 |
| Total revenue growth | 7.8% | 1.1% | 11.9% | -6.7% | 3.1% | -19.1% | -22.5% | -7.3% |
| Operating costs and expenses: | | | | | | | | |
| Total operating costs and expenses | 224.8 | 219.2 | 205.2 | 198.7 | 207.7 | 222.5 | | |
| Selling and administrative expenses | 131.7 | 126.7 | 127.5 | 112.5 | 116.0 | 113.3 | | |
| Broadcast license impairment | 0.2 | | 1.6 | 0.7 | | 20.1 | | |
| Total operating costs and expenses and selling and administrative expenses | 717.6 | 696.2 | 673.3 | 628.0 | 652.5 | 355.9 | | |
| Operating earnings | 71.7 | 51.3 | 58.7 | 39.5 | 53.0 | 9.6 | | |
| Operating margin | 16.7% | 12.9% | 14.9% | 11.3% | 14.1% | 2.6% | | |
| |
| Other income and (expense): | | | | | | | | |
| Interest income | | | 0.0 | 0.1 | 0.1 | 0.0 | | |
| Interest expense | -5.9 | -7.7 | -4.5 | -3.6 | -3.4 | -2.8 | | |
| Other | | -0.2 | | 3.5 | 3.3 | -2.8 | | |
| Total other income and (expense) | | 0.2 | | -3.5 | -3.3 | 2.8 | | |
| Earnings from continuing operations before income taxes | 65.8 | 43.4 | 54.3 | 36.0 | 49.7 | 6.8 | | |
| Provision for income taxes | 26.5 | 17.2 | 21.7 | 14.3 | 19.1 | 1.9 | | |
| Earnings from continuing operations | 39.3 | 26.3 | 32.6 | 21.7 | 30.7 | 4.9 | | |
| Earnings from discontinued operations, net of applicable income tax expense of $4,114, ($13) and $518, respectively | 5.9 | 0.0 | 0.7 | 0.5 | 3.7 | -0.6 | | |
| Net earnings | 45.2 | 26.2 | 33.3 | 22.2 | 34.4 | 0.0 | | |
| |
| Earnings per share: | | | | | | | | |
| Basic - Class A and B common stock: | | | | | | | | |
| Continuing operations (in dollars per share) | | | | | | | | |
| Discontinued operations (in dollars per share) | | | | | | | | |
| Net earnings (in dollars per share) | $0.90 | $0.52 | | | $1.16 | $0.60 | | |
| |
| Diluted - Class A and B common stock: | | | | | | | | |
| Continuing operations (in dollars per share) | | | | | | | | |
| Discontinued operations (in dollars per share) | | | | | | | | |
| Net earnings (in dollars per share) | $0.89 | $0.52 | $0.61 | $0.37 | $0.59 | $0.05 | | |
| |
| Basic and diluted - Class C common stock: | | | | | | | | |
| Continuing operations (in dollars per share) | | | | | | | | |
| Discontinued operations (in dollars per share) | | | | | | | | |
| Net earnings (in dollars per share) | | | | | | | | |