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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 $ 17,672 $ 19,084
Reconciliation of net income to net cash provided by operating activities:    
Depreciation and amortization 30,150 30,086
Goodwill impairment 17,674 0
Gain on disposition of businesses, net (13,763) 0
Stock-based compensation 2,732 2,610
Changes in operating assets and liabilities:    
Accounts receivable, net 485 1,108
Unbilled revenues, net (9,223) (8,740)
Accrued or prepaid income taxes 2,462 443
Accounts payable and accrued liabilities 16,097 (4,361)
Deferred revenues (1,491) 514
Accrued retirement costs (6,101) 1,545
Prepaid expenses and other operating activities 622 36
Net cash provided by operating activities 57,316 42,325
Cash Flows From Investing Activities:    
Acquisitions of property and equipment (10,850) (5,664)
Capitalization of computer software costs (12,793) (7,276)
Cash proceeds from disposition of business, net of cash disposed 19,273 0
Payments for business acquisitions, net of cash acquired 0 (2,296)
Net cash used in investing activities (4,370) (15,236)
Cash Flows From Financing Activities:    
Cash dividends paid (6,986) (9,894)
Proceeds from shares purchased under employee stock-based compensation plans 811 1,909
Repurchases of common stock (2,666) (25,673)
Increases in revolving credit facility borrowings 76,876 65,449
Payments on revolving credit facility borrowings (124,454) (64,962)
Payments on finance lease obligations (33) (106)
Cash paid for equity investments (603) 0
Dividends paid to noncontrolling interests (196) (458)
Net cash used in financing activities (57,251) (33,735)
Effects of exchange rate changes on cash and cash equivalents 1,242 (372)
Decrease in cash and cash equivalents (3,063) (7,018)
Cash and cash equivalents at beginning of year 51,802 53,119
Cash and cash equivalents at end of period $ 48,739 $ 46,101