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Consolidated Statements of Cash Flow - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Operating Activities    
Net income $ 61,348 $ 18,925
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 16,278 11,200
Stock-based compensation expense 6,677 5,820
Undistributed gains of equity method investments (971) (881)
Distributions in excess of current year income of equity method investments 1,771 1,346
Loss on disposal of fixed assets 0 29
Net realized and unrealized (gains) losses (13,451) 10,549
Changes in assets and liabilities:    
Increase in reserve for loss and loss expense, net of reinsurance recoverable 68,607 54,766
Increase in unearned premiums, net of prepaid reinsurance 40,374 32,732
Decrease in net federal income taxes 12,044 3,616
Increase in premiums receivable (44,396) (19,284)
Increase in deferred policy acquisition costs (8,142) (4,237)
Increase in interest and dividends due or accrued (491) (864)
Decrease in accrued salaries and benefits (38,529) (41,363)
Increase in other assets (8,711) (9,672)
Decrease in other liabilities (45,769) (70,387)
Net cash provided by (used in) operating activities 46,639 (7,705)
Investing Activities    
Purchase of fixed income securities, available-for-sale (474,962) (875,016)
Purchase of equity securities (6,702) (38,273)
Purchase of other investments (12,178) (13,471)
Purchase of short-term investments (2,416,285) (754,524)
Sale of fixed income securities, available-for-sale 218,411 675,396
Sale of short-term investments 2,449,725 737,097
Redemption and maturities of fixed income securities, held-to-maturity 579 484
Redemption and maturities of fixed income securities, available-for-sale 86,572 160,514
Sale of equity securities 3,721 40,740
Sale of other investments 4,995 3,497
Distributions from other investments 11,350 6,221
Purchase of property and equipment (7,955) (2,120)
Net cash used in investing activities (142,729) (59,455)
Financing Activities    
Dividends to stockholders (11,462) (10,203)
Acquisition of treasury stock (6,585) (6,116)
Net proceeds from stock purchase and compensation plans 1,760 1,435
Proceeds from borrowings 341,256 130,000
Repayments of borrowings (235,000) (75,000)
Repayments of finance lease obligations (284)  
Repayments of capital lease obligations   (734)
Net cash provided by financing activities 89,685 39,382
Net decrease in cash and restricted cash (6,405) (27,778)
Cash and restricted cash, beginning of year 16,919 44,710
Cash and restricted cash, end of period $ 10,514 $ 16,932