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Available-for-Sale Investments (Table Text Block) | 12 Months Ended
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Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract] |
Available-for-Sale Investments | Available-for-sale investments at March 31, 2015 were as follows:
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses More than 12 Months |  | Gross Unrealized Losses Less than 12 Months |  | Estimated Market Value
|  | (In thousands)
U.S. treasury securities and government obligations | $ | 99,722 | $ | 5,658 | $ | (64) | $ | – | $ | 105,316
U.S. government agency mortgage-backed securities |  | 30,569 |  | 2,614 |  | (39) |  | (3) |  | 33,141
Obligations of states and political subdivisions |  | 165,724 |  | 13,052 |  | (298) |  | (10) |  | 178,468
Corporate securities |  | 885,470 |  | 44,426 |  | (2,522) |  | (2,966) |  | 924,408
Mortgage-backed securities |  | 19,874 |  | 806 |  | (1) |  | – |  | 20,679
Redeemable preferred stocks |  | 18,052 |  | 521 |  | (253) |  | (24) |  | 18,296
Common stocks |  | 17,975 |  | 6,719 |  | – |  | (40) |  | 24,654
| $ | 1,237,386 | $ | 73,796 | $ | (3,177) | $ | (3,043) | $ | 1,304,962
Available-for-sale investments at March 31, 2014 were as follows:
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses More than 12 Months |  | Gross Unrealized Losses Less than 12 Months |  | Estimated Market Value
|  | (In thousands)
U.S. treasury securities and government obligations | $ | 49,883 | $ | 1,475 | $ | – | $ | (1,004) | $ | 50,354
U.S. government agency mortgage-backed securities |  | 36,258 |  | 2,558 |  | (4) |  | (425) |  | 38,387
Obligations of states and political subdivisions |  | 166,311 |  | 4,834 |  | (308) |  | (3,627) |  | 167,210
Corporate securities |  | 834,923 |  | 26,075 |  | (3,794) |  | (25,875) |  | 831,329
Mortgage-backed securities |  | 12,425 |  | 279 |  | (3) |  | (514) |  | 12,187
Redeemable preferred stocks |  | 18,445 |  | 283 |  | (82) |  | (1,113) |  | 17,533
Common stocks |  | 17,299 |  | 3,987 |  | (1) |  | (10) |  | 21,275
| $ | 1,135,544 | $ | 39,491 | $ | (4,192) | $ | (32,568) | $ | 1,138,275

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to 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 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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