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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015
Statement Of Cash Flows [Abstract] |  |
Cash flows from operating activities | $ 152,639 | $ 207,547
Cash flows from investing activities: |  |
Proceeds from sale of property and equipment |  | 51
Purchases of property and equipment | (3,637) | (7,414)
Payments to acquire a business |  | (1,000)
Purchases of equity securities | (35,267) | (36,522)
Purchases of fixed maturities | (241,613) | (73,320)
Purchases of short-term investments |  | (87,542)
Purchases of investment real estate, net | (2,074) | (5,882)
Proceeds from sales of equity securities | 43,766 | 17,412
Proceeds from sales of fixed maturities | 73,907 | 14,140
Proceeds from sales of short-term investments |  | 12,500
Maturities of fixed maturities | 22,479 | 53,344
Maturities of short-term investments | 25,000 | 25,009
Net cash provided by (used in) investing activities | (117,439) | (89,224)
Cash flows from financing activities: |  |
Preferred stock dividend | (5) | (5)
Common stock dividend | (4,915) | (4,237)
Issuance of common stock |  | 504
Purchase of treasury stock | (6,927) | (5,076)
Sale of treasury stock | 2,965 |
Purchase of preferred stock |  | (257)
Payments related to tax withholding for share-based compensation | (4,831) | (9,791)
Excess tax benefits (shortfall) from share-based compensation | (1,818) | 4,817
Borrowings under promissory note |  | 1,390
Repayment of debt | (1,400) | (7,735)
Net cash provided by (used in) financing activities | (16,931) | (20,390)
Net increase (decrease) in cash and cash equivalents | 18,269 | 97,933
Cash and cash equivalents at beginning of period | 197,014 | 115,397
Cash and cash equivalents at end of period | 215,283 | 213,330
Supplemental cash and non-cash flow disclosures: |  |
Interest paid | 303 | 567
Income taxes paid | 35,781 | $ 33,279
Income tax refund | $ 5,694 |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49171198&loc=d3e33268-110906 + Details
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- Definition The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the issuance of an equity stock that has been previously reacquired by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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- Definition Excess tax benefit expense from share based compensation financing activities. + References No definition available. + Details
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