Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities
Net income (loss)	$ 96,489	$ 39,421
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	80,675	110,883
Amortization of debt issuance costs	3,431	801
Deferred income taxes	(57,823)	(42,346)
Provision for credit losses	3,211	27,709
Provision for service credits	10,595	28,268
Stock-based compensation expense (benefit)	6,232	(4,195)
Other components of net periodic pension (benefit) cost	(998)	31,312
Loss on termination of leaseback obligations	3,409	0
(Gain) loss on disposal/write-off of fixed assets and capitalized software	(44)	3,476
Impairment charges	3,611	19,414
Non-cash (gain) loss from remeasurement of indemnification asset	(1,248)	3,878
Other, net	592	0
Changes in working capital items, excluding acquisitions:
Accounts receivable	48,791	15,742
Contract assets	3,837	(803)
Prepaid expenses and other assets	(3,184)	(3,785)
Accounts payable and accrued liabilities	(64,377)	(44,380)
Operating lease liability	(2,366)	(3,998)
Contract liabilities	(9,294)	(5,911)
Settlement of stock option liability	0	(896)
Net cash provided by operating activities	121,539	174,590
Cash Flows from Investing Activities
Additions to fixed assets and capitalized software	(20,053)	(17,030)
Proceeds from the sale of fixed assets	63	1,546
Acquisition of a business, net of cash acquired	(175,370)	0
Net cash (used in) investing activities	(195,360)	(15,484)
Cash Flows from Financing Activities
Proceeds from New Term Loan	418,070	0
Proceeds from New Term Loan, related party	260,930	0
Proceeds from ABL Facility	793,604	868,811
Payments of ABL Facility	(816,661)	(892,155)
Purchase of treasury stock	0	(30,626)
Other	4,184	113
Net cash provided by (used in) financing activities	87,517	(159,247)
Effect of exchange rate changes on cash and cash equivalents	(3,446)	0
Increase (decrease) in cash and cash equivalents and restricted cash	10,250	(141)
Cash and cash equivalents and restricted cash, beginning of period	2,406	1,912
Cash and cash equivalents and restricted cash, end of period	12,656	1,771
Supplemental Information
Cash paid for interest	52,491	56,845
Cash paid for income taxes, net	58,491	15,757
New Term Loan
Cash Flows from Financing Activities
Repayments of term loan	(86,199)	0
Repayments of term loan, related party	(36,801)	0
Senior Term Loan
Cash Flows from Financing Activities
Repayments of term loan	(335,821)	(72,629)
Repayments of term loan, related party	$ (113,789)	$ (32,761)