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Schedule II - Condensed Financial Information of Registrant (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Operating activities |  |  |
Net cash (used in) provided by operating activities | $ 81,048,000 | $ 43,709,000 | $ 44,844,000
Investing activities |  |  |
Purchases of property and equipment | (1,196,000) | (1,128,000) | (3,206,000)
Net cash used in investing activities | (9,330,000) | (42,943,000) | (36,657,000)
Financing activities |  |  |
Proceeds from stock option exercise | 781,000 | 3,339,000 | 1,455,000
Tax benefit from share-based payments | 421,000 | 1,043,000 | 238,000
Redemption of subordinated debt securities | (25,780,000) | (10,310,000) |
Purchase of treasury stock |  | (10,268,000) | (12,102,000)
Net cash used in financing activities | (24,578,000) | (16,196,000) | (10,409,000)
Change in cash and cash equivalents | 47,140,000 | (15,430,000) | (2,222,000)
Cash and cash equivalents at beginning of year | 45,536,000 | 60,966,000 | 63,188,000
Cash and cash equivalents at end of year | 92,676,000 | 45,536,000 | 60,966,000
Parent Company [Member] |  |  |
Operating activities |  |  |
Net cash (used in) provided by operating activities | 5,149,000 | (3,646,000) | 5,338,000
Investing activities |  |  |
Purchases of investments | (23,361,000) | (57,148,000) | (12,491,000)
Proceeds from sales of investments | 39,537,000 | 40,990,000 | 1,090,000
Purchases of property and equipment | (842,000) | (943,000) | (486,000)
Dividends from subsidiary | 21,000,000 | 32,000,000 | 32,300,000
Net cash used in investing activities | 36,334,000 | 14,899,000 | 20,413,000
Financing activities |  |  |
Proceeds from stock option exercise | 781,000 | 3,339,000 | 1,455,000
Tax benefit from share-based payments | 421,000 | 1,043,000 | 238,000
Redemption of subordinated debt securities | (25,780,000) | (10,310,000) |
Purchase of treasury stock |  | (10,268,000) | (12,102,000)
Net cash used in financing activities | (24,578,000) | (16,196,000) | (10,409,000)
Change in cash and cash equivalents | 16,905,000 | (4,943,000) | 15,342,000
Cash and cash equivalents at beginning of year | 14,887,000 | 19,830,000 | 4,488,000
Cash and cash equivalents at end of year | $ 31,792,000 | $ 14,887,000 | $ 19,830,000

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