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Condensed Financial Information of Registrant (Details1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
PREMIUMS EARNED AND OTHER REVENUES |  |  |  |  |  |  |  |  |  |  |
(Increase) decrease in unearned assumed premiums |  |  |  |  |  |  |  |  | $ 28,229 | $ 31,508 | $ 49,964
Premiums earned, net | 67,274 | 59,512 | 55,694 | 48,640 | 51,823 | 49,634 | 49,524 | 48,004 | 231,120 | 198,985 | 170,443
Investment income | 278 | 215 | (16) | (36) | 430 | 122 | (21) | 257 | 441 | 788 | 992
Net realized gains (losses) on investments |  |  |  |  |  |  |  |  | (11,943) | 2,350 | 27,692
Net change in unrealized gains (losses) on investments |  |  |  |  |  |  |  |  | 9,443 | (18,410) | 1,754
Commission revenue |  |  |  |  |  |  |  |  | 20,383 | 19,507 | 17,895
Total premiums earned and other revenues | 75,227 | 74,537 | 59,928 | 60,247 | 58,443 | 49,413 | 53,672 | 64,333 | 269,939 | 225,861 | 239,923
OPERATING COSTS AND EXPENSES |  |  |  |  |  |  |  |  |  |  |
General and administrative expenses |  |  |  |  |  |  |  |  | 91,193 | 67,834 | 64,290
Total operating costs and expenses | 65,863 | 60,563 | 46,936 | 44,018 | 62,165 | 48,170 | 40,551 | 41,257 | 217,380 | 192,143 | 177,645
LOSS BEFORE INCOME TAXES AND EQUITY IN NET INCOME OF SUBSIDIARIES |  |  |  |  |  |  |  |  | 52,559 | 33,718 | 62,278
Benefit from income taxes |  |  |  |  |  |  |  |  | 22,247 | 13,609 | 25,294
CONSOLIDATED NET INCOME | 4,406 | 8,256 | 7,777 | 9,873 | (2,313) | 975 | 7,549 | 13,898 | 30,312 | 20,109 | 36,984
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income | 4,406 | 8,256 | 7,777 | 9,873 | (2,313) | 975 | 7,549 | 13,898 | 30,312 | 20,109 | 36,984
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation |  |  |  |  |  |  |  |  | 3,830 | 2,848 | 2,962
Net realized (gains) losses on investments |  |  |  |  |  |  |  |  | 11,943 | (2,350) | (27,692)
Net change in unrealized (gains) losses on investments |  |  |  |  |  |  |  |  | (9,443) | 18,410 | (1,754)
Net foreign currency (gains) losses on investments |  |  |  |  |  |  |  |  | (23) | (1,532) | (1,143)
Deferred income taxes |  |  |  |  |  |  |  |  | 3,813 | (9,543) | (1,333)
Excess tax (benefits) shortfall from stock-based compensation |  |  |  |  |  |  |  |  | 1,760 | (195) | (4,099)
Other |  |  |  |  |  |  |  |  | 6 | (17) | (627)
Net change in assets and liabilities relating to operating activities: |  |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents |  |  |  |  |  |  |  |  | 45,304 | (64,372) | 5,175
Premiums receivable, net |  |  |  |  |  |  |  |  | (4,589) | (2,855) | (7,574)
Purchase of trading securities |  |  |  |  |  |  |  |  | (343,962) | (801,704) | (617,994)
Proceeds from sale of equity securities, trading |  |  |  |  |  |  |  |  | 360,000 | 921,625 | 549,305
Income taxes recoverable |  |  |  |  |  |  |  |  | (2,594) |  | 3,212
Income taxes payable |  |  |  |  |  |  |  |  | (13,801) | 4,653 | 12,012
Unearned premiums |  |  |  |  |  |  |  |  | 28,229 | 31,508 | 49,964
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | 141,997 | 110,129 | (4,060)
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Purchases of equity securities, available for sale |  |  |  |  |  |  |  |  |  |  | (80,730)
Proceeds from sales of equity securities, available for sale |  |  |  |  |  |  |  |  |  |  | 70,681
Net cash used in investing activities |  |  |  |  |  |  |  |  | (2,698) | (2,331) | (24,634)
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividend |  |  |  |  |  |  |  |  | (287) | (20) | (20)
Common stock dividend |  |  |  |  |  |  |  |  | (18,669) | (12,750) | (12,533)
Issuance of common stock |  |  |  |  |  |  |  |  | 207 | 5 | 14
Payments related to tax withholding for share-based compensation |  |  |  |  |  |  |  |  | (121) | (172) | (4,292)
Excess tax benefits (shortfall) from stock-based compensation |  |  |  |  |  |  |  |  | (1,760) | 195 | 4,099
Net cash used in financing activities |  |  |  |  |  |  |  |  | (21,592) | (11,758) | (11,470)
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 117,707 | 96,040 | (40,164)
Cash and cash equivalents at beginning of period |  |  |  | 229,685 |  |  |  | 133,645 | 229,685 | 133,645 | 173,809
Cash and cash equivalents at end of period | 347,392 |  |  |  | 229,685 |  |  |  | 347,392 | 229,685 | 133,645
Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation |  |  |  |  |  |  |  |  | 1,188 | 1,450 | 2,109
Excess tax (benefits) shortfall from stock-based compensation |  |  |  |  |  |  |  |  | 1,618 | (195) | (4,289)
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation |  |  |  |  |  |  |  |  | 2,642 | 1,398 | 853
Excess tax (benefits) shortfall from stock-based compensation |  |  |  |  |  |  |  |  | 142 |  | 190
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
PREMIUMS EARNED AND OTHER REVENUES |  |  |  |  |  |  |  |  |  |  |
Assumed premiums written |  |  |  |  |  |  |  |  | 10,686 | 20,703 | 4,534
(Increase) decrease in unearned assumed premiums |  |  |  |  |  |  |  |  |  |  | (7,292)
Premiums earned, net |  |  |  |  |  |  |  |  | 10,686 | 20,703 | 11,826
Investment income |  |  |  |  |  |  |  |  | 25 | 54 | 42
Net realized gains (losses) on investments |  |  |  |  |  |  |  |  | (1,880) | (1,186) | 1,379
Net change in unrealized gains (losses) on investments |  |  |  |  |  |  |  |  | 1,162 | (3,009) | 223
Management fee |  |  |  |  |  |  |  |  | 142 | 142 | 41
Commission revenue |  |  |  |  |  |  |  |  |  |  |
Total premiums earned and other revenues |  |  |  |  |  |  |  |  | 10,135 | 16,704 | 13,511
OPERATING COSTS AND EXPENSES |  |  |  |  |  |  |  |  |  |  |
General and administrative expenses |  |  |  |  |  |  |  |  | 25,051 | 20,830 | 20,417
Total operating costs and expenses |  |  |  |  |  |  |  |  | 25,051 | 20,830 | 20,417
LOSS BEFORE INCOME TAXES AND EQUITY IN NET INCOME OF SUBSIDIARIES |  |  |  |  |  |  |  |  | (14,916) | (4,126) | (6,906)
Benefit from income taxes |  |  |  |  |  |  |  |  | (6,312) | (1,667) | (2,664)
LOSS BEFORE EQUITY IN NET INCOME FROM SUBSIDIARIES |  |  |  |  |  |  |  |  | (8,604) | (2,459) | (4,242)
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  | 38,916 | 22,568 | 41,226
CONSOLIDATED NET INCOME |  |  |  |  |  |  |  |  | 30,312 | 20,109 | 36,984
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 30,312 | 20,109 | 36,984
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  | (38,916) | (22,568) | (41,226)
Amortization of stock-based compensation |  |  |  |  |  |  |  |  | 3,830 |  |
Net realized (gains) losses on investments |  |  |  |  |  |  |  |  | 1,880 | 1,186 | (1,379)
Net change in unrealized (gains) losses on investments |  |  |  |  |  |  |  |  | (1,162) | 3,009 | (223)
Deferred income taxes |  |  |  |  |  |  |  |  | 3,813 | (9,543) | (1,333)
Excess tax (benefits) shortfall from stock-based compensation |  |  |  |  |  |  |  |  | 1,760 | (195) | (4,099)
Other |  |  |  |  |  |  |  |  |  | 5 | 16
Net change in assets and liabilities relating to operating activities: |  |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents |  |  |  |  |  |  |  |  | 30,220 | (18,880) | 5,175
Premiums receivable, net |  |  |  |  |  |  |  |  |  |  | 8,721
Purchase of trading securities |  |  |  |  |  |  |  |  | (58,836) | (77,691) | (12,760)
Proceeds from sale of equity securities, trading |  |  |  |  |  |  |  |  | 60,379 | 66,526 | 10,897
Income taxes recoverable |  |  |  |  |  |  |  |  | (2,594) |  | 3,212
Income taxes payable |  |  |  |  |  |  |  |  | (13,801) | 4,653 | 12,012
Unearned premiums |  |  |  |  |  |  |  |  |  |  | (7,292)
Other operating assets and liabilities |  |  |  |  |  |  |  |  | 2,911 | 1,405 | 604
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  | 19,796 | (29,136) | 12,271
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Capital contributions to subsidiaries |  |  |  |  |  |  |  |  | (28,555) | (49,001) | (31,134)
Distribution of income from subsidiaries |  |  |  |  |  |  |  |  | 40,222 | 89,322 | 30,455
Purchases of equity securities, available for sale |  |  |  |  |  |  |  |  |  |  | (3,578)
Proceeds from sales of equity securities, available for sale |  |  |  |  |  |  |  |  |  |  | 10,702
Net cash used in investing activities |  |  |  |  |  |  |  |  | 11,667 | 40,321 | 6,445
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividend |  |  |  |  |  |  |  |  | (287) | (20) | (20)
Common stock dividend |  |  |  |  |  |  |  |  | (18,669) | (12,750) | (12,533)
Issuance of common stock |  |  |  |  |  |  |  |  | 207 | 5 | 14
Payments related to tax withholding for share-based compensation |  |  |  |  |  |  |  |  | (121) | (172) | (4,293)
Excess tax benefits (shortfall) from stock-based compensation |  |  |  |  |  |  |  |  | (1,760) | 195 | 4,099
Net cash used in financing activities |  |  |  |  |  |  |  |  | (20,630) | (12,742) | (12,733)
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 10,833 | (1,557) | 5,983
Cash and cash equivalents at beginning of period |  |  |  | 6,900 |  |  |  | 8,457 | 6,900 | 8,457 | 2,474
Cash and cash equivalents at end of period | 17,733 |  |  |  | 6,900 |  |  |  | 17,733 | 6,900 | 8,457
Parent Company [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation |  |  |  |  |  |  |  |  |  | 2,848 | 2,962
Parent Company [Member] | As Reported [Member] |  |  |  |  |  |  |  |  |  |  |
PREMIUMS EARNED AND OTHER REVENUES |  |  |  |  |  |  |  |  |  |  |
Assumed premiums written |  |  |  |  |  |  |  |  |  | 20,703 |
(Increase) decrease in unearned assumed premiums |  |  |  |  |  |  |  |  |  |  | (7,292)
Premiums earned, net |  |  |  |  |  |  |  |  |  | 20,703 |
Investment income |  |  |  |  |  |  |  |  |  | 54 |
Net realized gains (losses) on investments |  |  |  |  |  |  |  |  |  | (1,186) | 1,379
Net change in unrealized gains (losses) on investments |  |  |  |  |  |  |  |  |  | (3,009) | 223
Management fee |  |  |  |  |  |  |  |  |  | 142 |
Commission revenue |  |  |  |  |  |  |  |  |  |  |
Total premiums earned and other revenues |  |  |  |  |  |  |  |  |  | 16,704 |
OPERATING COSTS AND EXPENSES |  |  |  |  |  |  |  |  |  |  |
General and administrative expenses |  |  |  |  |  |  |  |  |  | 20,830 |
Total operating costs and expenses |  |  |  |  |  |  |  |  |  | 20,830 |
LOSS BEFORE INCOME TAXES AND EQUITY IN NET INCOME OF SUBSIDIARIES |  |  |  |  |  |  |  |  |  | (4,126) |
Benefit from income taxes |  |  |  |  |  |  |  |  |  | (3,016) |
LOSS BEFORE EQUITY IN NET INCOME FROM SUBSIDIARIES |  |  |  |  |  |  |  |  |  | (1,110) |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | 21,219 | 41,226
CONSOLIDATED NET INCOME |  |  |  |  |  |  |  |  |  | 20,109 | 36,984
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  | 20,109 | 36,984
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | (21,219) | (41,226)
Net realized (gains) losses on investments |  |  |  |  |  |  |  |  |  | 1,186 | (1,379)
Net change in unrealized (gains) losses on investments |  |  |  |  |  |  |  |  |  | 3,009 | (223)
Deferred income taxes |  |  |  |  |  |  |  |  |  | (9,543) | (1,333)
Excess tax (benefits) shortfall from stock-based compensation |  |  |  |  |  |  |  |  |  | (195) | (4,099)
Other |  |  |  |  |  |  |  |  |  | 5 | 16
Net change in assets and liabilities relating to operating activities: |  |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents |  |  |  |  |  |  |  |  |  | (18,880) | 5,175
Premiums receivable, net |  |  |  |  |  |  |  |  |  |  | 8,721
Purchase of trading securities |  |  |  |  |  |  |  |  |  | (77,691) | (12,760)
Proceeds from sale of equity securities, trading |  |  |  |  |  |  |  |  |  | 66,526 | 10,897
Income taxes recoverable |  |  |  |  |  |  |  |  |  |  | 3,212
Income taxes payable |  |  |  |  |  |  |  |  |  | 4,653 | 12,012
Unearned premiums |  |  |  |  |  |  |  |  |  |  | (7,292)
Other operating assets and liabilities |  |  |  |  |  |  |  |  |  | 1,404 | 604
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  | (27,182) | 12,271
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Capital contributions to subsidiaries |  |  |  |  |  |  |  |  |  | (49,001) | (39,161)
Purchases of equity securities, available for sale |  |  |  |  |  |  |  |  |  |  | (3,578)
Proceeds from sales of equity securities, available for sale |  |  |  |  |  |  |  |  |  |  | 10,702
Net cash used in investing activities |  |  |  |  |  |  |  |  |  | (49,001) | (32,037)
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividend |  |  |  |  |  |  |  |  |  | (20) | (20)
Common stock dividend |  |  |  |  |  |  |  |  |  | (12,750) | (12,533)
Issuance of common stock |  |  |  |  |  |  |  |  |  | 5 | 14
Payments related to tax withholding for share-based compensation |  |  |  |  |  |  |  |  |  | (172) | (4,293)
Excess tax benefits (shortfall) from stock-based compensation |  |  |  |  |  |  |  |  |  | 195 | 4,099
Transfers from subsidiaries |  |  |  |  |  |  |  |  |  | 87,972 | 38,482
Net cash used in financing activities |  |  |  |  |  |  |  |  |  | 74,626 | 25,749
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  |  | (1,557) | 5,983
Cash and cash equivalents at beginning of period |  |  |  |  |  |  |  | 8,457 |  | 8,457 | 2,474
Cash and cash equivalents at end of period |  |  |  |  | 6,900 |  |  |  |  | 6,900 | 8,457
Parent Company [Member] | As Reported [Member] | Correction [Member] |  |  |  |  |  |  |  |  |  |  |
PREMIUMS EARNED AND OTHER REVENUES |  |  |  |  |  |  |  |  |  |  |
Net change in unrealized gains (losses) on investments |  |  |  |  |  |  |  |  |  | (3,010) |
OPERATING COSTS AND EXPENSES |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | 20,219 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | (20,219) |
Net change in unrealized (gains) losses on investments |  |  |  |  |  |  |  |  |  | 3,010 |
Parent Company [Member] | As Reported [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation |  |  |  |  |  |  |  |  |  | 2,849 | 2,962
Parent Company [Member] | Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |
PREMIUMS EARNED AND OTHER REVENUES |  |  |  |  |  |  |  |  |  |  |
(Increase) decrease in unearned assumed premiums |  |  |  |  |  |  |  |  |  |  |
Net change in unrealized gains (losses) on investments |  |  |  |  |  |  |  |  |  | 1 |
Commission revenue |  |  |  |  |  |  |  |  |  |  |
OPERATING COSTS AND EXPENSES |  |  |  |  |  |  |  |  |  |  |
Benefit from income taxes |  |  |  |  |  |  |  |  |  | 1,349 |
LOSS BEFORE EQUITY IN NET INCOME FROM SUBSIDIARIES |  |  |  |  |  |  |  |  |  | (1,349) |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | 1,349 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | (1,349) |
Net change in unrealized (gains) losses on investments |  |  |  |  |  |  |  |  |  | (1) |
Net change in assets and liabilities relating to operating activities: |  |  |  |  |  |  |  |  |  |  |
Unearned premiums |  |  |  |  |  |  |  |  |  |  |
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  | (1,954) |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |
Capital contributions to subsidiaries |  |  |  |  |  |  |  |  |  |  | 8,027
Distribution of income from subsidiaries |  |  |  |  |  |  |  |  |  | 89,322 | 30,455
Net cash used in investing activities |  |  |  |  |  |  |  |  |  | 89,322 | 38,482
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |
Transfers from subsidiaries |  |  |  |  |  |  |  |  |  | (87,972) | (38,482)
Net cash used in financing activities |  |  |  |  |  |  |  |  |  | (87,368) | (87,368)
Parent Company [Member] | Adjustment [Member] | Correction [Member] |  |  |  |  |  |  |  |  |  |  |
OPERATING COSTS AND EXPENSES |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | 2,349 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  | (2,349) |
Parent Company [Member] | Adjustment [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Amortization of stock-based compensation |  |  |  |  |  |  |  |  |  | (1) |
Net change in assets and liabilities relating to operating activities: |  |  |  |  |  |  |  |  |  |  |
Other operating assets and liabilities |  |  |  |  |  |  |  |  |  | $ 1 |

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