Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Consolidated Statements of Cash Flows
Net cash provided by operating activities	$ 71,121	$ 38,528
Cash Flows from Investing Activities
Investments purchased	(393,382)	(311,402)
Investments sold	250,602	217,403
Investments called or matured	81,680	49,932
Net change in short-term investments	3,866	15,462
Net property and equipment purchased	(3,289)	(4,921)
Investment in equity method investee	(1,711)	(5,301)
Net cash used in investing activities	(62,234)	(38,827)
Cash Flows from Financing Activities
Cash dividends paid	(15,978)	(15,046)
Stock plan share issuance	1,779	2,760
Excess tax benefit from exercise of stock options	1,779	350
Net cash used in financing activities	(12,420)	(11,936)
Net decrease in cash	(3,533)	(12,235)
Cash at the beginning of the period	30,620	39,469
Cash at June 30	$ 27,087	$ 27,234