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Investments - OTTI Narrative and Table (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Other-Than-Temporary Impairments      
Other than temporary Impairments $ 186,000 $ 0 $ 0
OTTI recorded as OTTI losses recognized in earnings 94,000 0 0
Portion of net loss recognized in other comprehensive income, before taxes 92,000 0 0
Credit loss impairments on fixed maturity securities for which a portion of the OTTI loss was recognized in AOCI      
Balance, beginning of year 552,000 446,000 1,496,000
Additions for credit loss impairments recognized in the current period on securities not previously impaired 94,000 0 0
Reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security (68,000) (132,000) (11,000)
Reductions for credit loss impairments previously recognized on securities which matured, paid down, prepaid or were sold during the period (27,000) 238,000 (1,039,000)
Balance, end of year $ 551,000 $ 552,000 $ 446,000