XML 80 R40.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Investments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Investments [Abstract] |  |  |
Unrealized Gains On Investments |
($ in thousands) |  | 2011 |  | 2010 |  | 2009
AFS securities: |  |  |  |  |  |
Fixed maturity securities | $ | 130,517 |  | 56,754 |  | 19,413
Equity securities |  | 13,529 |  | 11,597 |  | 15,874
Total AFS securities |  | 144,046 |  | 68,351 |  | 35,287
HTM securities: |  |  |  |  |  |
Fixed maturity securities |  | 5,566 |  | 14,523 |  | 9,849
Total HTM securities |  | 5,566 |  | 14,523 |  | 9,849
Total net unrealized gains |  | 149,612 |  | 82,874 |  | 45,136
Deferred income tax expense |  | (52,364) |  | (29,006) |  | (15,797)
Net unrealized gains, net of deferred income tax | $ | 97,248 |  | 53,868 |  | 29,339
Unrealized adjustments not in OCI: |  |  |  |  |  |
Cumulative effect adjustment due to adoption of OTTI accounting |  |  |  |  |  |
guidance, net of deferred income tax |  | - |  | - |  | 2,380
Net unrealized gains, in OCI, net of deferred income tax | $ | 97,248 |  | 53,868 |  | 31,719
Increase in net unrealized gains in OCI, net of deferred income tax | $ | 43,380 |  | 24,529 |  | 86,554
Held-To-Maturity Securities Disclosure |
December 31, 2011 |  |  |  | Net |  |  |  |  |  |  |  |
|  |  |  | Unrealized |  |  |  | Unrecognized |  | Unrecognized |  |
|  | Amortized |  | Gains |  | Carrying |  | Holding |  | Holding |  | Fair
($ in thousands) |  | Cost |  | (Losses) |  | Value |  | Gains |  | Losses |  | Value
Foreign government | $ | 5,292 |  | 292 |  | 5,584 |  | - |  | (88) |  | 5,496
Obligations of state and political |  |  |  |  |  |  |  |  |  |  |  |
subdivisions |  | 614,118 |  | 11,894 |  | 626,012 |  | 31,529 |  | (156) |  | 657,385
Corporate securities |  | 64,840 |  | (2,189) |  | 62,651 |  | 6,887 |  | - |  | 69,538
ABS |  | 8,077 |  | (1,469) |  | 6,608 |  | 1,353 |  | (7) |  | 7,954
CMBS |  | 14,455 |  | (2,962) |  | 11,493 |  | 6,177 |  | - |  | 17,670
Total HTM fixed maturity securities | $ | 706,782 |  | 5,566 |  | 712,348 |  | 45,946 |  | (251) |  | 758,043
December 31, 2010 |  |  |  | Net |  |  |  |  |  |  |  |
|  |  |  | Unrealized |  |  |  | Unrecognized |  | Unrecognized |  |
|  | Amortized |  | Gains |  | Carrying |  | Holding |  | Holding |  | Fair
($ in thousands) |  | Cost |  | (Losses) |  | Value |  | Gains |  | Losses |  | Value
U.S. government and government agencies | $ | 93,411 |  | 4,695 |  | 98,106 |  | 5,023 |  | - |  | 103,129
Foreign government |  | 5,292 |  | 368 |  | 5,660 |  | - |  | (30) |  | 5,630
Obligations of states and political |  |  |  |  |  |  |  |  |  |  |  |
subdivisions |  | 874,388 |  | 22,183 |  | 896,571 |  | 16,845 |  | (1,132) |  | 912,284
Corporate securities |  | 76,663 |  | (3,990) |  | 72,673 |  | 9,705 |  | (313) |  | 82,065
ABS |  | 12,947 |  | (2,422) |  | 10,525 |  | 1,847 |  | (444) |  | 11,928
CMBS1 |  | 54,909 |  | (7,354) |  | 47,555 |  | 7,483 |  | (109) |  | 54,929
RMBS2 |  | 82,191 |  | 1,043 |  | 83,234 |  | 3,095 |  | - |  | 86,329
Total HTM fixed maturity securities | $ | 1,199,801 |  | 14,523 |  | 1,214,324 |  | 43,998 |  | (2,028) |  | 1,256,294
1 CMBS includes government guaranteed agency securities with a carrying value $8.9 million at December 31, 2010.
2 RMBS includes government guaranteed agency securities with a carrying value $4.0 million at December 31, 2010.
Available-For-Sale Securities Disclosure |
December 31, 2011 |  |  |  |  |  |  |  |
|  | Cost/ |  |  |  |  |  |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair
($ in thousands) |  | Cost |  | Gains |  | Losses |  | Value
U.S. government and government agencies1 | $ | 333,504 |  | 20,292 |  | - |  | 353,796
Foreign government |  | 33,687 |  | 1,042 |  | (556) |  | 34,173
Obligations of states and political subdivisions |  | 578,214 |  | 44,491 |  | (46) |  | 622,659
Corporate securities |  | 1,168,439 |  | 50,167 |  | (5,296) |  | 1,213,310
ABS |  | 77,706 |  | 1,289 |  | (46) |  | 78,949
CMBS2 |  | 107,838 |  | 6,427 |  | (1,667) |  | 112,598
RMBS3 |  | 467,468 |  | 16,187 |  | (1,767) |  | 481,888
AFS fixed maturity securities |  | 2,766,856 |  | 139,895 |  | (9,378) |  | 2,897,373
AFS equity securities |  | 143,826 |  | 13,617 |  | (88) |  | 157,355
Total AFS securities | $ | 2,910,682 |  | 153,512 |  | (9,466) |  | 3,054,728
December 31, 2010 |  |  |  |  |  |  |  |
|  | Cost/ |  |  |  |  |  |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair
($ in thousands) |  | Cost |  | Gains |  | Losses |  | Value
U.S. government and government agencies1 | $ | 312,384 |  | 8,292 |  | (147) |  | 320,529
Foreign government |  | 19,035 |  | 280 |  | (349) |  | 18,966
Obligations of states and political subdivisions |  | 512,013 |  | 22,534 |  | (650) |  | 533,897
Corporate securities |  | 973,835 |  | 28,674 |  | (8,784) |  | 993,725
ABS |  | 48,558 |  | 514 |  | (339) |  | 48,733
CMBS2 |  | 103,374 |  | 4,024 |  | (2,923) |  | 104,475
RMBS3 |  | 316,789 |  | 7,871 |  | (2,243) |  | 322,417
AFS fixed maturity securities |  | 2,285,988 |  | 72,189 |  | (15,435) |  | 2,342,742
AFS equity securities |  | 58,039 |  | 11,597 |  | - |  | 69,636
Total AFS securities | $ | 2,344,027 |  | 83,786 |  | (15,435) |  | 2,412,378
1 U.S. government includes corporate securities fully guaranteed by the Federal Deposit Insurance Corporation ("FDIC") with a fair value of $76.5 million at December 31, 2011 and $121.0 million at December 31, 2010.
2 CMBS includes government guaranteed agency securities with a fair value of $72.9 million at December 31, 2011 and $71.9 million at December 31, 2010.
3 RMBS includes government guaranteed agency securities with a fair value of $98.2 million at December 31, 2011 and $91.1 million at December 31, 2010.
Schedule of Fair Value and Gross Pre-Tax Net Unrealized/Unrecognized Loss of Securities by Length of Time |
December 31, 2011 |  | Less than 12 months |  | 12 months or longer
($ in thousands) |  | Fair Value |  | Unrealized Losses1 |  | Fair Value |  | Unrealized Losses1
AFS securities: |  |  |  |  |  |  |  |
Foreign government | $ | 8,299 |  | (556) |  | - |  | -
Obligations of states and political subdivisions |  | 517 |  | (1) |  | 1,740 |  | (45)
Corporate securities |  | 157,510 |  | (4,415) |  | 14,084 |  | (881)
ABS |  | 15,808 |  | (14) |  | 702 |  | (32)
CMBS |  | 4,822 |  | (48) |  | 14,564 |  | (1,619)
RMBS |  | 29,803 |  | (625) |  | 15,007 |  | (1,142)
Total fixed maturity securities |  | 216,759 |  | (5,659) |  | 46,097 |  | (3,719)
Equity securities |  | 743 |  | (88) |  | - |  | -
Subtotal | $ | 217,502 |  | (5,747) |  | 46,097 |  | (3,719)
|  | Less than 12 months |  | 12 months or longer
($ in thousands) |  | Fair Value |  | Unrealized Losses1 |  | Unrecognized Gains2 |  | Fair Value |  | Unrealized Losses1 |  | Unrecognized Gains2
HTM securities |  |  |  |  |  |  |  |  |  |  |  |
Obligations of states and political |  |  |  |  |  |  |  |  |  |  |  |
subdivisions | $ | 7,244 |  | (94) |  | 78 |  | 9,419 |  | (519) |  | 324
ABS |  | - |  | - |  | - |  | 2,816 |  | (1,009) |  | 737
CMBS |  | - |  | - |  | - |  | 2,794 |  | (1,447) |  | 761
Subtotal | $ | 7,244 |  | (94) |  | 78 |  | 15,029 |  | (2,975) |  | 1,822
Total AFS and HTM | $ | 224,746 |  | (5,841) |  | 78 |  | 61,126 |  | (6,694) |  | 1,822
December 31, 2010 |  | Less than 12 months |  | 12 months or longer
($ in thousands) |  | Fair Value |  | Unrealized Losses1 |  | Fair Value |  | Unrealized Losses1
AFS securities |  |  |  |  |  |  |  |
U.S. government and government agencies3 | $ | 3,956 |  | (147) |  | - |  | -
Foreign government |  | 10,776 |  | (349) |  | - |  | -
Obligations of states and political subdivisions |  | 40,410 |  | (650) |  | - |  | -
Corporate securities |  | 362,502 |  | (8,784) |  | - |  | -
ABS |  | 30,297 |  | (273) |  | 880 |  | (66)
CMBS |  | 5,453 |  | (271) |  | 11,115 |  | (2,652)
RMBS |  | 70,934 |  | (1,098) |  | 20,910 |  | (1,145)
Total fixed maturity securities |  | 524,328 |  | (11,572) |  | 32,905 |  | (3,863)
Equity securities |  | - |  | - |  | - |  | -
Subtotal | $ | 524,328 |  | (11,572) |  | 32,905 |  | (3,863)
|  | Less than 12 months |  | 12 months or longer
($ in thousands) |  | Fair Value |  | Unrealized (Losses) Gains1 |  | Unrecognized Gains (Losses)2 |  | Fair Value |  | Unrealized Losses1 |  | Unrecognized Gains2
HTM securities |  |  |  |  |  |  |  |  |  |  |  |
Obligations of states and political |  |  |  |  |  |  |  |  |  |  |  |
subdivisions | $ | 21,036 |  | (381) |  | 45 |  | 27,855 |  | (1,969) |  | 670
Corporate securities |  | 1,985 |  | (434) |  | 420 |  | - |  | - |  | -
ABS |  | 507 |  | (546) |  | (440) |  | 2,931 |  | (1,095) |  | 747
CMBS |  | 3,621 |  | 15 |  | (17) |  | 5,745 |  | (3,933) |  | 833
RMBS |  | - |  | - |  | - |  | 95 |  | (38) |  | 1
Subtotal | $ | 27,149 |  | (1,346) |  | 8 |  | 36,626 |  | (7,035) |  | 2,251
Total AFS and HTM | $ | 551,477 |  | (12,918) |  | 8 |  | 69,531 |  | (10,898) |  | 2,251
1 | Gross unrealized losses include non-OTTI unrealized amounts and OTTI losses recognized in AOCI. In addition, this column includes remaining unrealized gain or loss amounts on securities that were transferred to an HTM designation in the first quarter of 2009 for those securities that are in a net unrealized/unrecognized loss position.
2 | Unrecognized holding gains/(losses) represent fair value fluctuations from the later of: (i) the date a security is designated as HTM; or (ii) the date that an OTTI charge is recognized on an HTM security.
3 | U.S. government includes corporate securities fully guaranteed by the FDIC.
Schedule of the Number of Securities in an Unrealized Unrecognized Loss Position |
($ in thousands) December 31, 2011 |  | December 31, 2010
Number of Issues |  | % of Market/Book |  | Unrealized Unrecognized Loss |  | Number of Issues |  | % of Market/Book |  | Unrealized Unrecognized Loss
140 |  | 80% - 99% | $ | 10,166 |  | 193 |  | 80% - 99% | $ | 16,310
- |  | 60% - 79% |  | - |  | 2 |  | 60% - 79% |  | 1,125
1 |  | 40% - 59% |  | 469 |  | 2 |  | 40% - 59% |  | 2,160
- |  | 20% - 39% |  | - |  | 1 |  | 20% - 39% |  | 986
- |  | 0% - 19% |  | - |  | 1 |  | 0% - 19% |  | 976
|  |  | $ | 10,635 |  |  |  |  | $ | 21,557
Schedule of Held-To-Maturity Fixed Maturity Securities By Contractual Maturity |
($ in thousands) |  | Carrying Value |  | Fair Value
Due in one year or less | $ | 97,103 |  | 102,405
Due after one year through five years |  | 503,283 |  | 529,548
Due after five years through 10 years |  | 104,918 |  | 117,703
Due after 10 years |  | 7,044 |  | 8,387
Total HTM fixed maturity securities | $ | 712,348 |  | 758,043
Schedule of Available-for-Sale Fixed Maturity Securities By Contractual Maturity |
($ in thousands) |  | Fair Value
Due in one year or less | $ | 285,717
Due after one year through five years |  | 1,851,439
Due after five years through 10 years |  | 750,368
Due after 10 years |  | 9,849
Total AFS fixed maturity securities | $ | 2,897,373
Schedule of Other Investment Portfolio by Strategy and the Remaining Commitment Amount Associated With Each Strategy |
Other Investments |  | Carrying Value | 2011 |
|  | December 31, | December 31, | Remaining |
($ in thousands) |  | 2011 | 2010 | Commitment |
Alternative Investments |  |  |  |  |
Secondary private equity | $ | 30,114 | 26,709 | 9,507 |
Energy/power generation |  | 25,913 | 35,560 | 10,608 |
Private equity |  | 21,736 | 21,601 | 5,368 |
Distressed debt |  | 16,953 | 20,432 | 3,136 |
Real estate |  | 13,767 | 14,192 | 10,569 |
Mezzanine financing |  | 8,817 | 10,230 | 15,256 |
Venture capital |  | 7,248 | 6,386 | 900 |
Total alternative investments |  | 124,548 | 135,110 | 55,344 |
Other securities |  | 3,753 | 2,755 | 1,521 |
Total other investments | $ | 128,301 | 137,865 | 56,865 |
Schedule Of Aggregated Summarized Balance Sheet Financial Information For Partnerhips In Our Alternative Investment Portfolio [Table Text Block] |
Balance Sheet Information |  |  |  |  |
September 30, |  |  |  |  |
($ in millions) |  | 2011 |  | 2010 |
Investments | $ | 13,553 |  | 18,278 |
Total assets |  | 14,253 |  | 19,230 |
Total liabilities |  | 1,105 |  | 864 |
Partners' capital |  | 13,148 |  | 18,366 |
Schedule Of Aggregated Summarized Income Statement Financial Information For Partnerhips In Our Alternative Investment Portfolio [Table Text Block] |
Income Statement Information |  |  |  |  |  |
12 months ended September 30, |  |  |  |  |  |
($ in millions) |  | 2011 |  | 2010 |  | 2009
Net investment income | $ | 564 |  | 563 |  | 472
Realized gains (losses) |  | 893 |  | (358) |  | (499)
Net change in unrealized appreciation (depreciation) |  | 1,485 |  | 2,250 |  | (3,063)
Net income (loss) | $ | 2,942 |  | 2,455 |  | (3,090)
Insurance Subsidiaries net income (loss) | $ | 21 |  | 20 |  | (22)
Net Investment Income |
($ in thousands) |  | 2011 |  | 2010 |  | 2009
Fixed maturity securities | $ | 129,710 |  | 130,990 |  | 141,882
Equity securities, dividend income |  | 4,535 |  | 2,238 |  | 2,348
Trading securities, change in fair value |  | - |  | - |  | 262
Short-term investments |  | 160 |  | 437 |  | 1,273
Other investments |  | 20,539 |  | 20,313 |  | (21,726)
Miscellaneous income |  | 133 |  | 139 |  | 343
Investment expenses |  | (7,634) |  | (8,409) |  | (5,911)
Net investment income earned | $ | 147,443 |  | 145,708 |  | 118,471
OTTI by Asset Type |
2011 |  |  |  |  |  | Recognized in
($ in thousands) |  | Gross |  | Included in OCI |  | Earnings
Fixed maturity securities |  |  |  |  |  |
Obligations of state and political |  |  |  |  |  |
subdivisions | $ | 17 |  | - |  | 17
Corporate securities |  | 244 |  | - |  | 244
ABS |  | 175 |  | (546) |  | 721
CMBS |  | (149) |  | (843) |  | 694
RMBS |  | 346 |  | 201 |  | 145
Total fixed maturity securities |  | 633 |  | (1,188) |  | 1,821
Equity securities |  | 11,365 |  | - |  | 11,365
OTTI losses | $ | 11,998 |  | (1,188) |  | 13,186
2010 |  |  |  |  |  | Recognized in
($ in thousands) |  | Gross |  | Included in OCI |  | Earnings
Fixed maturity securities |  |  |  |  |  |
Obligations of state and political |  |  |  |  |  |
subdivisions | $ | 197 |  | - |  | 197
ABS |  | (20) |  | (179) |  | 159
CMBS |  | 5,552 |  | (863) |  | 6,415
RMBS |  | 7,953 |  | (391) |  | 8,344
Total fixed maturity securities |  | 13,682 |  | (1,433) |  | 15,115
Equity securities |  | 2,543 |  | - |  | 2,543
OTTI losses | $ | 16,225 |  | (1,433) |  | 17,658
2009 |  |  |  |  |  | Recognized in
($ in thousands) |  | Gross |  | Included in OCI |  | Earnings
Fixed maturity securities |  |  |  |  |  |
Corporate securities | $ | 1,271 |  | - |  | 1,271
ABS |  | 1,190 |  | (1,292) |  | 2,482
CMBS |  | 18,865 |  | 7,088 |  | 11,777
RMBS |  | 40,751 |  | 2,972 |  | 37,779
Total fixed maturity securities |  | 62,077 |  | 8,768 |  | 53,309
Equity securities |  | 2,107 |  | - |  | 2,107
OTTI losses | $ | 64,184 |  | 8,768 |  | 55,416
Gross Credit Loss Impairments on Fixed Maturity Securities for Which a Portion of the OTTI Charge Was Recognized In OCI |
($ in thousands) |  | 2011 | 2010 | 2009
Balance, beginning of year | $ | 17,723 | 22,189 | -
Credit losses remaining in retained earnings after adoption of OTTI accounting guidance |  | - | - | 9,719
Addition for the amount related to credit loss for which an OTTI was not previously recognized |  | - | 2,326 | 10,579
Reductions for securities sold during the period |  | - | (2,990) | -
Reductions for securities for which the amount previously recognized in OCI was recognized in |  |  |  |
earnings because of intention or potential requirement to sell before recovery of amortized cost |  | - | - | -
Reductions for securities for which the entire amount previously recognized in OCI was recognized in |  |  |  |
earnings due to a decrease in cash flows expected |  | (11,672) | (8,143) | (693)
Additional increases to the amount related to credit loss for which an OTTI was previously recognized |  | 551 | 4,341 | 2,584
Accretion of credit loss impairments previously recognized due to an increase in cash flows expected |  |  |  |
to be collected |  | - | - | -
Balance, end of year | $ | 6,602 | 17,723 | 22,189
Components of Net Realized Gains (Losses) Excluding OTTI Charges |
($ in thousands) |  | 2011 |  | 2010 |  | 2009
HTM fixed maturity securities |  |  |  |  |  |
Gains | $ | 4 |  | 569 |  | 225
Losses |  | (564) |  | (894) |  | (1,049)
AFS fixed maturity securities |  |  |  |  |  |
Gains |  | 9,385 |  | 8,161 |  | 20,899
Losses |  | (70) |  | (7,619) |  | (13,889)
AFS equity securities |  |  |  |  |  |
Gains |  | 6,671 |  | 16,698 |  | 33,355
Losses |  | - |  | (1,156) |  | (28,056)
Other investments |  |  |  |  |  |
Gains |  | - |  | - |  | -
Losses |  | - |  | (5,184) |  | (2,039)
Total other net realized investment gains |  | 15,426 |  | 10,575 |  | 9,446
Total OTTI charges recognized in earnings |  | (13,186) |  | (17,658) |  | (55,416)
Total net realized gains (losses) | $ | 2,240 |  | (7,083) |  | (45,970)

X
- Definition This item represents the disclosure for investment income earned from securities and other investments including dividends on equity securities, interest on debt securities and short-term investments, and gains (losses) on other investments. This item does not include realized gains (losses) or unrealized gains (losses) on holdings of available-for-sale or held-to-maturity securities. + References No definition available. + Details
Name: | sigi_NetInvestmentIncomeTableTextblock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of aggregate summarized balance sheet information for alternative investments accounted for by the equity method. + References No definition available. + Details
Name: | sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of aggregate summarized balance sheet information for alternative investments accounted for by the equity method. + References No definition available. + Details
Name: | sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the schedule for available-for-sale fixed maturity securities based on contractual maturities. + References No definition available. + Details
Name: | sigi_ScheduleOfAvailableForSaleFixedMaturitySecuritiesByContractualMaturitiesTableTextBlock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the schedule of held-to-maturity securities based on contractual maturities. + References No definition available. + Details
Name: | sigi_ScheduleOfHeldToMaturityFixedMaturitySecuritiesByContractualMaturitiesTextblock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure showing the number of held-to-maturity and available-for-sale securities in an unrealized/unrecognized loss position by percentage of market value compared to book value and the related unrealized/unrecognized loss amount. + References No definition available. + Details
Name: | sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTableTextBlock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents disclosure of information regarding the other investment portfolio, including carrying value and remaining commitments on the portfolio, broken out by strategy. + References No definition available. + Details
Name: | sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the schedule of other-than-temporary impairments recognized in the statement of income and other comprehensive income by asset type. + References No definition available. + Details
Name: | sigi_ScheduleOfOTTIByAssetTypeTextblock
Namespace Prefix: | sigi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of available-for-sale securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: 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=6872113&loc=d3e27290-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: 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=6872113&loc=d3e27357-111563 Reference 8: 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=6872113&loc=d3e27198-111563 Reference 9: 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=6872113&loc=d3e27337-111563 Reference 10: 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=6872113&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6435544&loc=d3e41834-113960 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5086-111524 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=6872113&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 5 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 137 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563 Reference 7: 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=6872113&loc=d3e27290-111563 Reference 8: 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 9: 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 + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings including: (a) the beginning balance of the amount related to credit losses on debt securities held by the investor at the beginning of the period for which a portion of an OTTI was recognized in other comprehensive income; (b) additions for the amount related to the credit loss for which an OTTI was not previously recognized; (c) reductions for securities sold during the period (realized); (d) reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the investor intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis; (e) additional increases to the amount related to the credit loss for which an OTTI was previously recognized when the investor does not intend to sell the security and it is not more likely than not that the investor will be required to sell the security before recovery of its amortized cost basis; (f) reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security; and (g) the ending balance of the amount related to credit losses on debt securities held by the entity at the end of the period for which a portion of an OTTI was recognized in other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section 50 -Paragraph 8 -SubTopic 10 -Topic 320 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27340-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 18B -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of realized gains and losses on investments reported in the statement of income. + References No definition available. + Details
Name: | us-gaap_RealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 320 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 6 -Section 50 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
Name: | us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
Name: | us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration