XML 67 R42.htm IDEA: XBRL DOCUMENT v2.4.0.8
Financial Instruments - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Investments [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance $ 12,974 $ 12,760 $ 12,954 $ 12,482
Total Realized and Unrealized Gains (Losses) (413) (41) 210 396
Purchases and Issuances 1,000 231 1,000 358
Sales and Settlements (7,435) (145) (8,038) (442)
Transfers In (Out)       11
Ending Balance 6,126 12,805 6,126 12,805
Other [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance      100 50
Total Realized and Unrealized Gains (Losses)         
Purchases and Issuances      100 50
Sales and Settlements         
Transfers In (Out)         
Ending Balance          
Derivative Contracts [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance 2,329 2,334 2,647 2,347
Total Realized and Unrealized Gains (Losses) (83) 81 235 94
Ending Balance 2,412 2,253 2,412 2,253
Mortgage and Other Asset-Backed Securities [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance 67 12 40 16
Total Realized and Unrealized Gains (Losses)   3   (3)
Purchases and Issuances   11   95
Sales and Settlements (8)   (8) (80)
Transfers In (Out) (59)   (32) (2)
Ending Balance   26   26
Municipal Obligations [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance 11,569 10,120 9,394 3,562
Total Realized and Unrealized Gains (Losses) (192) (13) 733 (510)
Purchases and Issuances 2,275 655 3,725 9,960
Sales and Settlements (150) (90) (350) (2,340)
Ending Balance 13,502 10,672 13,502 10,672
Other [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning Balance 66,743 64,644 62,963 65,001
Total Realized and Unrealized Gains (Losses) (53) 410 (1,173) (351)
Purchases and Issuances 475 5,950 9,450 20,675
Sales and Settlements   (4,625) (4,075) (18,946)
Ending Balance $ 67,165 $ 66,379 $ 67,165 $ 66,379