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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Operating activities |  |
Net income | $ 98,204 | $ 104,431
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization of property, equipment and internal-use software | 35,929 | 28,154
Amortization of intangible assets | 24,523 | 24,586
Provision for uncollectible overdrawn accounts | 64,686 | 63,358
Employee stock-based compensation | 30,136 | 37,373
Amortization of (discount) premium on available-for-sale investment securities | (209) | 914
Change in fair value of contingent consideration | (1,866) | 13,500
Amortization of deferred financing costs | 1,253 | 1,195
Impairment of capitalized software | 121 | 352
Changes in operating assets and liabilities: |  |
Accounts receivable, net | (58,683) | (55,486)
Prepaid expenses and other assets | 9,679 | 1,458
Deferred expenses | 14,438 | 13,783
Accounts payable and other accrued liabilities | (20,132) | (13,315)
Deferred revenue | (19,385) | (11,587)
Income tax receivable/payable | 25,961 | 2,452
Other, net | 6 | 3,174
Net cash provided by operating activities | 204,661 | 214,342
Investing activities |  |
Purchases of available-for-sale investment securities | (117,959) | (128,991)
Proceeds from maturities of available-for-sale securities | 72,569 | 45,774
Proceeds from sales of available-for-sale securities | 4,905 | 11,125
Payments for acquisition of property and equipment | (58,185) | (43,397)
Net increase in loans | (1,457) | (5,617)
Net cash used in investing activities | (100,127) | (121,106)
Financing activities |  |
Repayments of borrowings from notes payable | (60,000) | (16,875)
Proceeds from exercise of options | 4,862 | 19,123
Taxes paid related to net share settlement of equity awards | (18,159) | (33,180)
Net decrease in deposits | (133,132) | (5,506)
Net decrease in obligations to customers | (25,311) | (24,861)
Contingent consideration payments | (3,634) | (3,856)
Repurchase of Class A common stock | (100,000) | 0
Net cash used in financing activities | (335,374) | (65,155)
Net (decrease) increase in unrestricted cash, cash equivalents and restricted cash | (230,840) | 28,081
Unrestricted cash, cash equivalents and restricted cash, beginning of period | 1,095,218 | 1,010,095
Unrestricted cash, cash equivalents and restricted cash, end of period | 864,378 | 1,038,176
Cash paid for interest | 2,049 | 3,335
Cash (refund from)/paid for income taxes | (3,612) | 4,313
Total unrestricted cash, cash equivalents and restricted cash, end of period | $ 1,095,218 | $ 1,010,095

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- Definition The net amount paid or received by the reporting entity associated with purchase (sale or collection) of loans receivable arising from the financing of goods and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3098-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3095-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash outflow for financing costs associated with business combinations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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