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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
OPERATING ACTIVITIES |  |
Net income | $ 84,342 | $ 17,782
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 58,709 | 56,140
Amortization of intangibles | 1,927 | 1,959
Pension settlement expense |  | 89
Share-based compensation expense | 5,678 | 5,071
Provision for losses on accounts receivable | (334) | 999
Change in deferred income taxes | (7,612) | (5,170)
Gain on sale of property and equipment and lease termination | (8,408) | (3,581)
Gain on sale of subsidiaries | (6,923) |
Changes in operating assets and liabilities: |  |
Receivables | (37,745) | 9,626
Prepaid expenses | 1,419 | 1,444
Other assets | 25 | 4,358
Income taxes | 12,275 | 8,413
Operating right-of-use assets and lease liabilities, net | 761 | (230)
Accounts payable, accrued expenses, and other liabilities | 41,786 | (14,833)
NET CASH PROVIDED BY OPERATING ACTIVITIES | 145,900 | 82,067
INVESTING ACTIVITIES |  |
Purchases of property, plant and equipment, net of financings | (25,395) | (16,209)
Proceeds from sale of property and equipment | 10,864 | 7,670
Proceeds from sale of subsidiaries | 9,013 |
Purchases of short-term investments | (43,690) | (97,493)
Proceeds from sale of short-term investments | 49,165 | 46,725
Capitalization of internally developed software | (9,477) | (6,495)
NET CASH USED IN INVESTING ACTIVITIES | (9,520) | (65,802)
FINANCING ACTIVITIES |  |
Borrowings under credit facilities |  | 180,000
Borrowings under accounts receivable securitization program |  | 45,000
Payments on long-term debt | (54,643) | (29,185)
Net change in book overdrafts | (922) | 615
Deferred financing costs | (189) |
Payment of common stock dividends | (4,095) | (4,082)
Purchases of treasury stock | (8,100) | (3,162)
Payments for tax withheld on share-based compensation | (9,766) | (1,070)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES | (77,715) | 188,116
NET INCREASE IN CASH AND CASH EQUIVALENTS | 58,665 | 204,381
Cash and cash equivalents at beginning of period | 303,954 | 201,909
CASH AND CASH EQUIVALENTS CASH AT END OF PERIOD | 362,619 | 406,290
NONCASH INVESTING ACTIVITIES |  |
Equipment and other financings | 8,138 | 13,566
Accruals for equipment received | 5,984 | 857
Lease liabilities arising from obtaining right-of-use assets | $ 6,051 | $ 23,727

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