Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities:
Net income	$ 7,065	$ 2,208
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,107	27,425
Loss on disposal of assets, net	123	101
Amortization of debt issuance costs and debt discount	942	911
Loss on extinguishment of debt	0	2,830
Amortization of deferred capacity revenue	(4,881)	(3,400)
Stock-based compensation	1,218	766
Deferred income tax expense	2,890	1,534
Charge for uncollectible accounts	(955)	275
Amortization of right-of-use assets	2,072	1,716
Other non-cash (income) expense, net	(99)	52
Changes in operating assets and liabilities	12,404	8,202
Net cash provided by operating activities	50,886	42,620
Cash Flows from Investing Activities:
Capital expenditures	(32,940)	(31,556)
Capitalized interest	(1,006)	(983)
Change in unsettled capital expenditures	402	583
Proceeds on sale of assets	0	20
Net cash used by investing activities	(33,544)	(31,936)
Cash Flows from Financing Activities:
Repayments of long-term debt	(6,641)	(172,903)
Proceeds from the issuance of long-term debt	0	180,000
Debt issuance costs and discounts	0	(2,683)
Cash paid for debt extinguishment	0	(1,252)
Payment of cash dividend on common stock	(4,836)	0
Payment of withholding taxes on stock-based compensation	(439)	(448)
Purchases of treasury stock	0	(1,812)
Proceeds from the issuance of common stock	124	106
Net cash (used) provided by financing activities	(11,792)	1,008
Change in cash, cash equivalents and restricted cash	5,550	11,692
Cash, cash equivalents and restricted cash, beginning of period	28,293	14,985
Cash, cash equivalents and restricted cash, end of period	33,843	26,677
Supplemental Cash Flow Data:
Interest paid	8,432	9,236
Income taxes paid, net	$ 4	$ 10