STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating revenue
Service agreement revenue	$ 7,145	$ 7,258
Total operating revenue	572,160	399,316
Operating expenses
Total operating expenses	494,593	332,376
Operating income	77,567	66,940
Investment income
Net investment income	6,820	5,981
Net realized investment (losses) gains	(465)	516
Net impairment losses recognized in earnings	0	(121)
Equity in (losses) earnings of limited partnerships	(192)	213
Total investment income	6,163	6,589
Interest expense, net	553	166
Other income (expense)	44	(409)
Income before income taxes	83,221	72,954
Income tax expense	17,463	25,078
Net income	$ 65,758	$ 47,876
Class A
Net income per share
Common stock - basic (in dollars per share)	$ 1.41	$ 1.03
Common stock - diluted (in dollars per share)	$ 1.26	$ 0.91
Weighted average shares outstanding – Basic
Common stock - basic (in shares)	46,187,908	46,188,522
Weighted average shares outstanding – Diluted
Common stock - diluted (in shares)	52,310,628	52,408,560
Dividends declared per share
Common stock (in dollars per share)	$ 0.8400	$ 0.7825
Class B
Net income per share
Common stock - basic (in dollars per share)	212	154
Common stock - diluted (in dollars per share)	$ 212	$ 154
Weighted average shares outstanding – Basic
Common stock - basic (in shares)	2,542	2,542
Weighted average shares outstanding – Diluted
Common stock - diluted (in shares)	2,542	2,542
Dividends declared per share
Common stock (in dollars per share)	$ 126.000	$ 117.375
Policy issuance and renewal services
Operating revenue
Management fee revenue, net	$ 405,978	$ 392,058
Operating expenses
Cost of operations	348,630	$ 332,376
Administrative services
Operating revenue
Management fee revenue, net	13,074
Administrative services reimbursement revenue	145,963
Operating expenses
Cost of operations	$ 145,963