CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Comprehensive income (loss)
Net income	$ 100,230	$ 145,512
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(1,160)	(22,213)
Net unrealized investment gains (losses)	(633,604)	203,115
Defined benefit pension and postretirement plan adjustments	(471)	924
Total other comprehensive income (loss), net of tax	(635,235)	181,826
Total comprehensive income (loss)	$ (535,005)	$ 327,338

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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