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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Cash flows from operating activities: |  |
Net income | $ 208,420,000 | $ 178,412,000
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 33,191,000 | 28,477,000
Deferred tax expense | 106,163,000 | 88,157,000
Net realized investment losses (gains) | 164,000 | (3,892,000)
Loss on debt extinguishment | 65,000 | 15,308,000
Change in certain assets and liabilities: |  |
Accrued investment income | 43,000 | 515,000
Prepaid insurance premium | 25,000 | 48,000
Reinsurance recoverable on loss reserves | 5,710,000 | (728,000)
Reinsurance recoverable on paid losses | (1,187,000) | (1,454,000)
Premium receivable | 1,048,000 | 1,867,000
Deferred insurance policy acquisition costs | (918,000) | (1,439,000)
Profit commission receivable | (4,603,000) | (2,793,000)
Loss reserves | (251,724,000) | (261,069,000)
Unearned premiums | 22,273,000 | 28,451,000
Return premium accrual | (11,900,000) | (7,300,000)
Income taxes payable - current | 32,991,000 | 523,000
Other, net | (14,205,000) | (8,090,000)
Net cash provided by operating activities | 125,556,000 | 54,993,000
Purchases of investments: |  |
Fixed income | (545,281,000) | (723,409,000)
Equity securities | (38,000) | (3,128,000)
Proceeds from sales of fixed income | 166,606,000 | 649,776,000
Proceeds from maturity of fixed income | 390,344,000 | 313,484,000
Proceeds from sale of equity securities | 0 | 2,525,000
Net increase in payable for securities | 3,447,000 | 24,519,000
Additions to property and equipment | (9,659,000) | (2,724,000)
Net cash provided by investing activities | 5,419,000 | 261,043,000
Cash flows from financing activities: |  |
Proceeds from revolving credit facility | 150,000,000 | 0
Repayment of revolving credit facility | (150,000,000) | 0
Proceeds from issuance of long-term debt | 0 | 155,000,000
Purchase or repayment of convertible senior notes | (145,620,000) | (182,846,000)
Payment of original issue discount - convertible senior notes | (4,504,000) | (5,655,000)
Purchase of convertible junior subordinated debentures | 0 | (100,860,000)
Payment of original issue discount - convertible junior subordinated debentures | 0 | (41,540,000)
Cash portion of loss on debt extinguishment | 0 | (15,308,000)
Payment of debt issuance costs | (1,630,000) | 0
Payment of withholding taxes related to share-based compensation net share settlement | (6,723,000) | (4,973,000)
Net cash used in financing activities | (158,477,000) | (196,182,000)
Net (decrease) increase in cash and cash equivalents | (27,502,000) | 119,854,000
Cash and cash equivalents at beginning of period | 155,410,000 | 181,120,000
Cash and cash equivalents at end of period | $ 127,908,000 | $ 300,974,000

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- Definition The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 + Details
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- Definition The cash inflow associated with the sale of debt securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the sale of equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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