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Shareholders' Equity (AOCI Reclassification) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Reclassifications from AOCI to net income: |  |  |  |
Realized investment gains (losses) | $ (1,691) | $ (656) | $ 726 | $ 960
Tax effect | 355 | 230 | (153) | (336)
Net reclassification adjustments | (1,336) | (426) | 573 | 624
Deferred tax expense (benefit) included in OCI | (2,185) | 2,983 | (9,245) | 4,464
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |  |
Reclassifications from AOCI to net income: |  |  |  |
Realized investment gains (losses) | (1,691) | (653) | 726 | 963
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member] |  |  |  |
Reclassifications from AOCI to net income: |  |  |  |
Realized investment gains (losses) | $ 0 | $ (3) | $ 0 | $ (3)

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- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=79507043&loc=d3e39076-109324 + Details
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