v2.4.0.8
Fair Value Measurement (Details 3) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Assets        
Beginning Balance $ 71,453 $ 56,036 $ 60,140 $ 54,996
Included in Earnings, as a part of        
Net Investment Income (1)   (119)  
Equity in earnings of unconsolidated subsidiaries 433 180 2,281 770
Net realized investment gains (losses) (44) 0 (113) (131)
Included in other comprehensive income (390) (28) (390) 578
Purchases 9,138 3,732 27,447 3,732
Sales (11,340) (670) (13,081) (695)
Transfers in 0 0 1,701 0
Transfers out (3,637) (15,742) (12,254) (15,742)
Ending Balance 65,612 43,508 65,612 43,508
Change in unrealized gains (losses) included in earnings for the above period for Level 3 assets held at period-end 433 180 2,281 770
State and municipal bonds [Member]
        
Assets        
Beginning Balance 7,175 7,175 7,175 7,200
Included in Earnings, as a part of        
Net Investment Income 0   0  
Equity in earnings of unconsolidated subsidiaries 0 0 0 0
Net realized investment gains (losses) (44) 0 (44) 0
Included in other comprehensive income 0 0 0 0
Purchases 0 0 0 0
Sales (2,106) 0 (2,106) (25)
Transfers in 0 0 0 0
Transfers out 0 0 0 0
Ending Balance 5,025 7,175 5,025 7,175
Change in unrealized gains (losses) included in earnings for the above period for Level 3 assets held at period-end 0 0 0 0
Corporate debt [Member]
        
Assets        
Beginning Balance 9,662 8,689 15,191 8,082
Included in Earnings, as a part of        
Net Investment Income 0   (102)  
Equity in earnings of unconsolidated subsidiaries 0 0 0 0
Net realized investment gains (losses) 0 0 (69) 0
Included in other comprehensive income (293) (28) (293) 578
Purchases 3,595 1,937 7,470 1,937
Sales (249) (88) (865) (87)
Transfers in 0 0 0 0
Transfers out (1,356) 0 (9,973) 0
Ending Balance 11,359 10,510 11,359 10,510
Change in unrealized gains (losses) included in earnings for the above period for Level 3 assets held at period-end 0 0 0 0
Asset-backed securities [Member]
        
Assets        
Beginning Balance 7,076 0 4,035 0
Included in Earnings, as a part of        
Net Investment Income (1)   (17)  
Equity in earnings of unconsolidated subsidiaries 0 0 0 0
Net realized investment gains (losses) 0 0 0 0
Included in other comprehensive income (97) 0 (97) 0
Purchases 0 1,795 1,356 1,795
Sales (18) 0 (18) 0
Transfers in 0 0 1,701 0
Transfers out (2,281) 0 (2,281) 0
Ending Balance 4,679 1,795 4,679 1,795
Change in unrealized gains (losses) included in earnings for the above period for Level 3 assets held at period-end 0 0 0 0
Investment in LPs/LLCs [Member]
        
Assets        
Beginning Balance 47,540 24,430 33,739 23,841
Included in Earnings, as a part of        
Net Investment Income 0   0  
Equity in earnings of unconsolidated subsidiaries 433 180 2,281 770
Net realized investment gains (losses) 0 0 0 0
Included in other comprehensive income 0 0 0 0
Purchases 5,543 0 18,621 0
Sales (8,967) (582) (10,092) (583)
Transfers in 0 0 0 0
Transfers out 0 0 0 0
Ending Balance 44,549 24,028 44,549 24,028
Change in unrealized gains (losses) included in earnings for the above period for Level 3 assets held at period-end 433 180 2,281 770
Other Investments [Member]
        
Assets        
Beginning Balance 0 15,742 0 15,873
Included in Earnings, as a part of        
Net Investment Income 0   0  
Equity in earnings of unconsolidated subsidiaries 0 0 0 0
Net realized investment gains (losses) 0 0 0 (131)
Included in other comprehensive income 0 0 0 0
Purchases 0 0 0 0
Sales 0 0 0 0
Transfers in 0 0 0 0
Transfers out 0 (15,742) 0 (15,742)
Ending Balance 0 0 0 0
Change in unrealized gains (losses) included in earnings for the above period for Level 3 assets held at period-end $ 0 $ 0 $ 0 $ 0