Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

Years Ended December 31,
(in thousands, except per share data)
2017	First		Second		Third		Fourth
Total Revenues	$	3,008,740	$	3,129,276	$	3,145,310	$	3,232,443
Total benefits and expenses	2,800,896		2,789,961		2,805,148		2,976,949
Income before income taxes	207,844		339,315		340,162		255,494
Net Income	145,512		232,190		227,591		1,216,888
Earnings Per Share:
Basic earnings per share	$	2.26	$	3.60	$	3.53	$	18.89
Diluted earnings per share	2.22		3.54		3.47		18.49
2016	First		Second		Third		Fourth
Total Revenues	$	2,512,568	$	3,039,068	$	2,900,577	$	3,069,298
Total benefits and expenses	2,404,988		2,685,845		2,612,977		2,773,755
Income before income taxes	107,580		353,223		287,600		295,543
Net Income	76,472		236,103		198,719		190,149
Earnings Per Share:
Basic earnings per share	$	1.18	$	3.68	$	3.10	$	2.96
Diluted earnings per share	1.17		3.64		3.07		2.92