CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Service revenue	$ 148,450	$ 147,879	$ 297,622	$ 294,656
Operating expenses:
Network operations	56,514	56,180	113,963	113,272
Selling, general, and administrative	39,386	41,392	80,013	82,834
Depreciation and amortization	23,071	22,096	45,762	44,065
Total operating expenses	118,971	119,668	239,738	240,171
Gains on equipment transactions			460	18
Gains on lease transactions	87
Operating income	29,566	28,211	58,344	54,503
Interest expense	(13,478)	(14,236)	(27,648)	(30,071)
Change in valuation - interest rate swap	(7,510)		(28,781)
Foreign exchange gain (loss) - 2024 Euro Notes	23,547	(5,280)	31,561	13,590
Loss on debt extinguishment and redemption - 2024 Euro Notes			(11,885)	(14,698)
Loss on debt extinguishment and redemption - 2022 Notes				(14,698)
Nonoperating Income (Expense)	(522)	64	(195)	807
Income (loss) before income taxes	19,718	(2,071)	21,396	24,131
Income tax expense	(8,554)	(422)	(9,095)	(7,773)
Net income (loss)	11,164	(2,493)	12,301	16,358
Comprehensive income (loss):
Net income (loss)	11,164	(2,493)	12,301	16,358
Foreign currency translation adjustment	(7,493)	1,776	(9,658)	(3,434)
Comprehensive income (loss)	$ 3,671	$ (717)	$ 2,643	$ 12,924
Net income (loss) per common share:
Basic net income (loss) per common share	$ 0.24	$ (0.05)	$ 0.26	$ 0.35
Diluted net income (loss) per common share	0.24	(0.05)	0.26	0.35
Dividends declared per common share	$ 0.88	$ 0.78	$ 1.735	$ 1.535
Weighted-average common shares - basic (in shares)	46,691,142	46,229,603	46,705,088	46,227,528
Weighted-average common shares - diluted (in shares)	47,029,446	46,229,603	47,050,911	46,744,070
2022 Notes
Operating expenses:
Loss on debt extinguishment and redemption - 2022 Notes		$ (10,830)
2024 Euro Notes
Operating expenses:
Loss on debt extinguishment and redemption - 2024 Euro Notes	$ (11,885)