Quarterly financial information (unaudited):

12 Months Ended

Dec. 31, 2021

Quarterly financial information (unaudited):

Quarterly financial information (unaudited):

11. Quarterly financial information (unaudited):

	Three months ended
	March 31,		June 30,		September 30,		December 31,
	2021		2021		2021		2021
	(in thousands, except share and per share amounts)
Service revenue	$	146,777	$	147,879	$	147,927	$	147,208
Network operations, including equity-based compensation expense		57,092		56,180		56,645		56,418
Operating income		26,291		28,211		28,556		36,165
Net income (loss) (1)		18,851		(2,493)		13,320		18,507
Net income (loss) per common share - basic		0.41		(0.05)		0.29		0.40
Net income (loss) per common share - diluted		0.41		(0.05)		0.28		0.39
Weighted-average number of common shares—basic		46,067,096		46,229,603		46,293,524		46,420,168
Weighted-average number of common shares—diluted		46,507,258		46,229,603		46,866,929		46,992,639

	Three months ended
	March 31,		June 30,		September 30,		December 31,
	2020		2020		2020		2020
	(in thousands, except share and per share amounts)
Service revenue	$	140,915	$	140,990	$	142,302	$	143,901
Network operations, including equity-based compensation expense		55,921		53,886		54,519		54,829
Operating income		25,850		27,574		26,036		27,384
Net income ( loss) (2)		9,227		8,564		(6,555)		(6,620)
Net income (loss) per common share - basic		0.20		0.19		(0.11)		(0.14)
Net income (loss) per common share - diluted		0.20		0.18		(0.11)		(0.14)
Weighted-average number of common shares—basic		45,658,565		45,754,880		45,815,718		45,904,943
Weighted-average number of common shares—diluted		46,391,066		46,686,665		45,815,718		45,904,943

(1) Included in net income (loss) for the three months ended March 31, 2021, June 30, 2021, September 30, 2021 and December 31, 2021 are unrealized gains (losses) on foreign exchange on the Company’s 2024 Notes of $18.9 million, ($5.3) million, $10.2 million and $8.8 million, respectively. Included in net income (loss) for the three months ended March 31, 2021 and June 30, 2021, are losses on debt extinguishment and redemption on the Company’s 2022 Notes of $3.9 million and $10.8 million, respectively. Included in net income for the three months ended December 31, 2021 is a gain on lease termination of $7.4 million.

(2) Included in net income (loss) for the three months ended March 31, 2020, June 30, 2020, September 30, 2020 and December 31, 2020 are unrealized gains (losses) on foreign exchange on the Company’s 2024 Notes of $2.9 million, ($3.4) million, ($17.3) million and $(19.2) million, respectively. Included in net income for the three months ended June 30, 2020 was a realized gain on foreign exchange on the Company’s 2024 Notes of $2.5 million.