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Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 41 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total non-amortizing intangibles | $ 78,314 | $ 78,314 | $ 78,314 |  | $ 64,475
Gross Carrying Amount | 488,492 | 488,492 | 488,492 |  | 496,776
Accumulated Amortization and Other | (237,975) | (237,975) | (237,975) |  | (195,222)
Net | 250,517 | 250,517 | 250,517 |  | 301,554
Total intangible assets, gross | 566,806 | 566,806 | 566,806 |  | 561,251
Total intangible assets, net | 328,831 | 328,831 | 328,831 | $ 352,201 | 366,029
Waived management fees under affiliate agreement | $ 9,700 | 29,000 | 127,400 |  |
Waived management fees under affiliate agreement, expected to be collected |  | 128,200 |  |  |
Waived management fees under affiliate agreement amount expected to collect monthly |  | 4,200 |  |  |
Remaining lease term (in years) | 20 years |  |  |  |
Sprint affiliate contract expansion - Wireless |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | $ 455,305 | 455,305 | 455,305 |  | 455,305
Accumulated Amortization and Other | (212,194) | (212,194) | (212,194) |  | (167,830)
Net | 243,111 | 243,111 | 243,111 |  | 287,475
FCC spectrum licenses |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 4,659 | 4,659 | 4,659 |  | 0
Accumulated Amortization and Other | (39) | (39) | (39) |  | 0
Net | 4,620 | 4,620 | 4,620 |  | 0
Finite-lived intangible assets acquired | 4,700 |  |  |  |
Favorable leases - Wireless |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 0 | 0 | 0 |  | 15,743
Accumulated Amortization and Other | 0 | 0 | 0 |  | (1,919)
Net | 0 | 0 | 0 |  | 13,824
Acquired subscribers - Cable |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 28,065 | 28,065 | 28,065 |  | 25,265
Accumulated Amortization and Other | (25,499) | (25,499) | (25,499) |  | (25,250)
Net | 2,566 | 2,566 | 2,566 |  | 15
Other intangibles |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 463 | 463 | 463 |  | 463
Accumulated Amortization and Other | (243) | (243) | (243) |  | (223)
Net | 220 | 220 | 220 |  | 240
Cable franchise rights |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total non-amortizing intangibles | 64,334 | 64,334 | 64,334 |  | 64,334
FCC spectrum licenses |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total non-amortizing intangibles | 13,839 | 13,839 | 13,839 |  | 0
Indefinite-lived intangible assets acquired | 13,800 |  |  |  |
Railroad crossing rights |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Total non-amortizing intangibles | $ 141 | $ 141 | $ 141 |  | $ 141

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