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Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Amounts reclassified into net income: Non-credit OTTI |  | $ 357
Non-credit OTTI, Tax |  | (125)
Amounts reclassified into net income: Non-credit OTTI | $ 0 | 232
Reclassification of net unrealized gains on HTM securities including disposals and amortization | (72) | (261)
Total HTM related, Tax | 25 | 91
Amounts reclassified from AOCI, HTM related | (47) | (170)
Realized losses (gains) on AFS disposals and OTTI | 2,699 | (19,895)
Total realized losses (gains) on AFS disposals and OTTI | (945) | 6,963
Amounts reclassified into net income: realized gains on available for sale securities | 1,754 | (12,932)
Amount reclassified into net income: Net actuarial loss, Gross | 1,516 | 1,709
Defined pension and other post-retirement benefit plans, Tax | (530) | (598)
Total defined benefit pension and post-retirement plans | 986 | 1,111
Investment Income [Member] |  |
Amortization of net unrealized gains on HTM securities | (100) | (311)
Income Before Federal Income Tax [Member] |  |
Amounts reclassified into net income: Non-credit OTTI | 0 | 357
Reclassification of net unrealized gains on HTM securities including disposals and amortization | (72) | (261)
Realized losses (gains) on AFS disposals and OTTI | 2,699 | (19,895)
Amount reclassified into net income: Net actuarial loss, Gross | 1,516 | 1,709
Total Federal Income Tax Expense [Member] |  |
Non-credit OTTI, Tax | 0 | (125)
Total HTM related, Tax | 25 | 91
Total realized losses (gains) on AFS disposals and OTTI | (945) | 6,963
Defined pension and other post-retirement benefit plans, Tax | (530) | (598)
Net Income Financial Statement Line Item [Member] |  |
Amounts reclassified into net income: Non-credit OTTI | 0 | 232
Amounts reclassified from AOCI, HTM related | (47) | (170)
Amounts reclassified into net income: realized gains on available for sale securities | 1,754 | (12,932)
Total defined benefit pension and post-retirement plans | 986 | 1,111
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 2,693 | (11,759)
Net Realized Investment Gains [Member] |  |
Unrealized gains and losses on HTM disposals | 28 | 50
Realized losses (gains) on AFS disposals and OTTI | 2,699 | (19,895)
Net Realized Investment Gains [Member] | Non-credit OTTI on Disposed Securities [Member] |  |
Amounts reclassified into net income: Non-credit OTTI | 0 | 357
Loss And Loss Expense Incurred [Member] |  |
Amount reclassified into net income: Net actuarial loss, Gross | 329 | 371
Policy acquisition costs [Member] |  |
Amount reclassified into net income: Net actuarial loss, Gross | $ 1,187 | $ 1,338

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