Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Consolidated Statements of Cash Flows
Net cash provided by operating activities	$ 11,265	$ 21,266
Cash Flows from Investing Activities
Investments purchased	(88,910)	(128,242)
Investments sold	67,667	114,930
Investments called or matured	33,880	19,800
Net change in short-term investments	(3,435)	(14,897)
Net property and equipment purchased	(3,298)	(4,088)
Acquisition of agency		(850)
Net cash provided by (used in) investing activities	5,904	(13,347)
Cash Flows from Financing Activities
Cash dividends paid	(8,793)	(8,286)
Proceeds from stock option exercises	(1,499)	(1,480)
Excess tax benefit from exercise of stock options		2,375
Net cash used in financing activities	(7,294)	(4,431)
Net increase in cash	9,875	3,488
Cash at the beginning of the period	18,269	11,081
Cash at the end of the period	$ 28,144	$ 14,569