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Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consisted of the following as of June 30, 2020 and December 31, 2019:
(in thousands) | June 30, 2020 |  | December 31, 2019
Accrued interest | $ | 136,369 |  |  | $ | 115,070 |
Payroll-related accruals | 100,362 |  |  | 91,944 |
Other accrued liabilities | 376,190 |  |  | 270,352 |
Accrued expenses and other current liabilities | $ | 612,921 |  |  | $ | 477,366 |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments and Securities | carrying amount and fair value of long-term debt instruments as of the periods presented below:
| June 30, 2020 |  |  |  | December 31, 2019 |  |
(in thousands) | Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Debt instruments, excluding finance lease obligations | $ | 9,681,495 |  |  | $ | 9,849,485 |  |  | $ | 9,617,491 |  |  | $ | 10,177,751 |
Schedule of Cash and Cash Equivalents | The following table provides a reconciliation of the amount of cash and cash equivalents and restricted cash and cash equivalents reported in the Condensed Consolidated Balance Sheets to the total of the same of such amounts shown in the Condensed Consolidated Statements of Cash Flows:
(in thousands) | June 30, 2020 |  | December 31, 2019
Cash and cash equivalents | $ | 45,473 |  |  | $ | 48,736 |
Restricted cash and cash equivalents in prepaid expenses and other current assets | 669 |  |  | — |
Cash and cash equivalents and restricted cash and cash equivalents at end of period | $ | 46,142 |  |  | $ | 48,736 |
Schedule of Carrying Values and Fair Values of Retail Installment Contract Receivables | he carrying amount and fair value of retail installment contract receivables as of the periods presented below:
| June 30, 2020 |  |  |  | January 1, 2020(1) |  |
(in thousands) | Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Retail installment contract receivables, net | $ | 66,119 |  |  | $ | 61,523 |  |  | $ | 9,743 |  |  | $ | 8,946 |
________________ (1)Balances reflected are subsequent to the adoption of CECL (as defined below) on January 1, 2020.
Subscriber System Assets | The gross carrying amount, accumulated depreciation, and net carrying amount of subscriber system assets as of June 30, 2020 and December 31, 2019 were as follows:
(in thousands) | June 30, 2020 |  | December 31, 2019
Gross carrying amount | $ | 4,553,515 |  |  | $ | 4,597,908 |
Accumulated depreciation | (1,919,631) |  |  | (1,858,612) |
Subscriber system assets, net | $ | 2,633,884 |  |  | $ | 2,739,296 |

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