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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 35 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total non-amortizing intangibles | $ 64,475 | $ 64,475 |  | $ 64,475
Gross Carrying Amount | 483,833 | 483,833 |  | 496,776
Accumulated Amortization and Other | (208,594) | (208,594) |  | (195,222)
Net | 275,239 | 275,239 |  | 301,554
Total intangible assets, gross | 548,308 | 548,308 |  | 561,251
Total intangible assets, net | 339,714 | 339,714 | $ 352,201 | 366,029
Waived management fees under affiliate agreement | 9,600 | 108,000 |  |
Affiliate contract expansion - Wireless |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 455,305 | 455,305 |  | 455,305
Accumulated Amortization and Other | (183,076) | (183,076) |  | (167,830)
Net | 272,229 | 272,229 |  | 287,475
Favorable leases - Wireless |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 0 | 0 |  | 15,743
Accumulated Amortization and Other | 0 | 0 |  | (1,919)
Net | 0 | 0 |  | 13,824
Acquired subscribers - Cable |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 28,065 | 28,065 |  | 25,265
Accumulated Amortization and Other | (25,285) | (25,285) |  | (25,250)
Net | 2,780 | 2,780 |  | 15
Other intangibles |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount | 463 | 463 |  | 463
Accumulated Amortization and Other | (233) | (233) |  | (223)
Net | 230 | 230 |  | 240
Cable franchise rights |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total non-amortizing intangibles | 64,334 | 64,334 |  | 64,334
Railroad crossing rights |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Total non-amortizing intangibles | $ 141 | $ 141 |  | $ 141

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