Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities
Net income	$ 6,542	$ 18,875
Adjustments to reconcile net income to net cash provided by operating activities:
Early extinguishment of debt		7,753
Deferred income tax provision	1,018	3,458
Depreciation and amortization	68,813	68,687
Losses on sale of equipment	5,685	4,709
Share based compensation	2,810	1,356
Other	783	(2,091)
Interest paid (received) in kind		(7,516)
Gain on sale of subsidiary	(670)
Changes in operating assets and liabilities:
Receivables	(5,650)	(30,102)
Prepaid insurance and licenses	(12,189)	(9,754)
Operating supplies	(443)	(96)
Other assets	(4,800)	(4,190)
Accounts payable and other accrued liabilities	22,076	(11,531)
Accrued wages and benefits	(729)	5,304
Net cash provided by operating activities	83,246	44,862
Investing activities
Payments for purchases of property and equipment	(127,899)	(125,556)
Proceeds from sales of property and equipment	33,301	36,915
Other	(2,000)	(500)
Sale of subsidiary, net of cash	(6,432)
Net cash used in investing activities	(103,030)	(89,141)
Financing activities
Borrowings under lines of credit	56,200	219,332
Payments under lines of credit	(53,300)	(248,665)
Borrowings under long-term debt	78,803	289,943
Payments of long-term debt	(73,472)	(464,375)
Payments of financing costs and original issue discount	(170)	(4,162)
Proceeds from IPO, net of issuance costs		246,685
Payments of long-term consideration for business acquisition	(990)	(1,010)
Purchase of noncontrolling interest	(8,659)
Tax withholding related to net share settlement of restricted stock awards	(44)
Proceeds from issuance of common stock under ESPP	349
Repurchase of membership units		(217)
Book overdraft	3,833	3,626
Net cash provided by financing activities	2,550	41,157
Change in cash previously included in assets held for sale	11,784
Net change in cash and cash equivalents	(5,450)	(3,122)
Cash and cash equivalents:
Beginning of period	9,892	9,232
End of period	4,442	6,110
Supplemental disclosure of cash flow information
Cash paid during the year for interest	16,102	42,306
Cash paid during the year for income taxes	311	1,368
Supplemental disclosure of significant noncash investing and financing activities
Debt obligations relieved in conjunction with the divestiture of Xpress Internacional	7,109
Property and equipment amounts accrued in accounts payable	1,622
Capital lease extinguishments	40	1,096
Uncollected proceeds from asset sales	$ 1,607	$ 231