CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Comprehensive income (loss)
Net income	$ 236,103	$ 130,391	$ 312,575	$ 255,505
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	9,942	21,935	87,675	(95,836)
Net unrealized investment gains	643,893	(757,641)	1,191,118	(413,717)
Defined benefit pension and postretirement plan adjustments	1,156	834	(1,703)	1,788
Total other comprehensive income (loss), net of tax	654,991	(734,872)	1,277,090	(507,765)
Total comprehensive income (loss)	$ 891,094	$ (604,481)	$ 1,589,665	$ (252,260)