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Schedule II Condensed Financial Information of Registrant (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash flows - operating activities |  |  |
Interest expense paid | $ (11,754) | $ (13,521) | $ (13,902)
Federal income taxes recovered | 27,847 | 24,861 | 29,195
Other, net, including settlement of payables to subsidiaries | (20,312) | (6,101) | (17,437)
Net cash provided by operating activities | 207,418 | 207,043 | 221,933
Cash flows - investing activities |  |  |
Net cash provided by (used in) investing activities | (325,360) | (415,849) | (565,515)
Cash flows - financing activities |  |  |
Dividends paid to shareholders | (44,310) | (42,523) | (39,237)
Proceeds from issuance of Senior Notes due 2025 | 0 | 246,937 | 0
Redemption of Senior Notes due 2016 | 0 | (127,292) | 0
Maturity of Senior Notes due 2015 | 0 | (75,000) | 0
Principal repayment on Bank Credit Facility | 0 | (38,000) | 0
Exercise of stock options | 3,329 | 1,629 | 8,252
Net cash used in financing activities | 119,103 | 212,640 | 337,068
Net decrease in cash | 1,161 | 3,834 | (6,514)
Cash at beginning of period | 15,509 | 11,675 | 18,189
Cash at end of period | 16,670 | 15,509 | 11,675
Parent Company [Member] |  |  |
Cash flows - operating activities |  |  |
Interest expense paid | (11,754) | (13,521) | (13,902)
Federal income taxes recovered | 8,914 | 8,413 | 10,030
Cash dividends received from subsidiaries | 59,600 | 50,000 | 46,000
Other, net, including settlement of payables to subsidiaries | (3,434) | (4,097) | (1,478)
Net cash provided by operating activities | 53,326 | 40,795 | 40,650
Cash flows - investing activities |  |  |
Net increase (decrease) in investments | 9,161 | 15,402 | (4,647)
Net cash provided by (used in) investing activities | 9,161 | 15,402 | (4,647)
Cash flows - financing activities |  |  |
Dividends paid to shareholders | (44,310) | (42,523) | (39,237)
Proceeds from issuance of Senior Notes due 2025 | 0 | 246,937 | 0
Redemption of Senior Notes due 2016 | 0 | (127,292) | 0
Maturity of Senior Notes due 2015 | 0 | (75,000) | 0
Principal repayment on Bank Credit Facility | 0 | (38,000) | 0
Acquisition of treasury stock | (21,513) | (21,950) | (5,411)
Exercise of stock options | 3,329 | 1,629 | 8,252
Net cash used in financing activities | (62,494) | (56,199) | (36,396)
Net decrease in cash | (7) | (2) | (393)
Cash at beginning of period | 75 | 77 | 470
Cash at end of period | $ 68 | $ 75 | $ 77

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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. 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 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. Cash is 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. Includes effect from exchange rate changes. + References Reference 1: 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 outflow for the settlement of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, as it matures. + 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=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3574-108585 Reference 2: 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 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + 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 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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