CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 48,185	$ 6,216	$ 37,520
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	89,240	83,477	80,247
Amortization of debt discount and premium	1,759	1,894	1,807
Equity-based compensation expense (net of amounts capitalized)	26,822	23,525	18,460
Unrealized foreign currency exchange loss (gain) on 2024 Euro Notes	(32,522)	36,997	(2,271)
Realized foreign currency exchange gain on 2024 Euro Notes		(2,533)
Gain - lease termination	(7,375)
Gains-equipment transactions and other, net	69	(546)	(358)
Deferred income taxes	18,159	282	12,158
Changes in operating assets and liabilities:
Accounts receivable	1,385	(2,702)	1,067
Prepaid expenses and other current assets	(17)	(2,771)	(3,730)
Deposits and other assets	(12)	(873)	(1,131)
Accounts payable, accrued liabilities and other long-term liabilities	9,866	(3,284)	5,040
Net cash provided by operating activities	170,257	140,320	148,809
Cash flows from investing activities:
Purchases of property and equipment	(69,916)	(55,952)	(46,958)
Net cash used in investing activities	(69,916)	(55,952)	(46,958)
Cash flows from financing activities:
Net proceeds from issuance of 2026 Notes, net of debt costs of $1,317	496,933
Net proceeds from issuance of 2024 Euro Notes, net of debt costs of $2,137 and $1,556, respectively		240,285	152,134
Redemption and extinguishment of 2022 Notes	(459,317)
Redemption and extinguishment of 2021 Notes		(189,225)
Dividends paid	(150,288)	(129,412)	(112,647)
Principal payments of finance lease obligations	(23,054)	(23,990)	(9,097)
Principal payments of installment payment agreement	(6,922)	(10,547)	(10,007)
Purchases of common stock		(4,495)
Proceeds from exercises of common stock options	1,823	1,382	1,637
Net cash (used in) provided by financing activities	(140,825)	(116,002)	22,020
Effect of exchange rate changes on cash	(2,193)	3,513	(542)
Net (decrease) increase in cash and cash equivalents & restricted cash	(42,677)	(28,121)	123,329
Cash and cash equivalents & restricted cash, beginning of year	371,301	399,422	276,093
Cash and cash equivalents & restricted cash, end of year	328,624	371,301	399,422
Supplemental disclosures of cash flow information:
Cash paid for interest	59,497	62,917	56,022
Cash paid for income taxes	4,452	3,446	3,409
Non-cash investing and financing activities:
Finance lease obligations incurred	50,831	71,622	14,307
PP&E obtained for installment payment agreement		5,771	11,255
Fair value of equipment acquired in leases		536	1,207
Non-cash component of network equipment obtained in exchange transactions		320	$ 978
Senior notes
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on extinguishment & redemption of 2022 notes		638
Loss on extinguishment & redemption of 2021 notes		$ 638
2022 Notes
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on extinguishment & redemption of 2022 notes	14,698
Senior secured 2026 Notes
Cash flows from financing activities:
Net proceeds from issuance of 2026 Notes, net of debt costs of $1,317	$ 496,900