Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net income (loss)	$ 53,096	$ (1,129)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	4,564	5,710
Amortization	5,334	3,117
Provision for doubtful accounts	2,229	281
Stock-based compensation	1,772	3,392
Deferred income taxes	11,441	(1,346)
Amortization of deferred financing costs and debt discount	136	201
Equity in net (gain) loss of investee	(1,875)	2,971
Reduction of right of use assets	4,373	5,093
Loss on disposal of assets	216	0
Changes in operating assets and liabilities:
Accounts receivable and other receivables	8,206	(7,389)
Prepaid expenses and other	(13,119)	(3,680)
Income taxes on gain from sale of business	173	8,223
Self-funded insurance programs	615	(1,235)
Accounts payable and accrued expenses	50,324	9,775
Accrued transportation costs	(3,010)	2,936
Deferred revenue	462	(433)
Long-term contract payables and other long-term liabilities	22,251	(3,416)
Net cash provided by operating activities	147,188	23,071
Investing activities
Purchase of property and equipment	(2,330)	(4,277)
Acquisition, net of cash acquired	(77,665)	0
Net cash used in investing activities	(79,995)	(4,277)
Financing activities
Proceeds from debt	162,000	12,000
Repayment of debt	(162,000)	(12,000)
Preferred stock conversion payment	(82,769)	0
Preferred stock dividends	(1,961)	(2,185)
Repurchase of common stock, for treasury	(10,186)	(372)
Proceeds from common stock issued pursuant to stock option exercise	11,329	6,383
Restricted stock surrendered for employee tax payment	(37)	0
Other financing activities	(154)	(566)
Net cash (used in) provided by financing activities	(83,778)	3,260
Net change in cash, cash equivalents and restricted cash	(16,585)	22,054
Cash, cash equivalents and restricted cash at beginning of period	61,673	12,367
Cash, cash equivalents and restricted cash at end of period	$ 45,088	$ 34,421