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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Cash flows from operating activities:    
Net cash provided by (used in) operating activities $ 31,451 $ 52,326
Cash flows from investing activities:    
Proceeds from sale of property and equipment 8 12
Purchases of property and equipment (6,368) (1,314)
Purchases of equity securities (697) (9,857)
Purchases of available-for-sale debt securities (55,102) (121,996)
Purchases of investment real estate, net (734) (1,034)
Proceeds from sales of equity securities 17,161 1,045
Proceeds from sales of available-for-sale debt securities 14,550 99,464
Maturities of available-for-sale debt securities 36,635 25,363
Net cash provided by (used in) investing activities 5,453 (8,317)
Cash flows from financing activities:    
Preferred stock dividend (3) (3)
Common stock dividend (5,620) (4,912)
Issuance of common stock for stock option exercises 239 0
Purchase of treasury stock (10,117) (2,746)
Payments related to tax withholding for share-based compensation (2,402) (4,793)
Repayment of debt (368) (368)
Net cash provided by (used in) financing activities (18,271) (12,822)
Cash and cash equivalents, and restricted cash and cash equivalents:    
Net increase (decrease) during the period 18,633 31,187
Balance, beginning of period 169,063 216,121
Balance, end of period 187,696 247,308
Cash and cash equivalents, and restricted cash and cash equivalents within the Consolidated Balance Sheets    
Total cash and cash equivalents and restricted cash and cash equivalents $ 169,063 $ 216,121