Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Unaudited Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities	$ 14,163	$ 13,609
Investing activities:
Purchases of available-for-sale investments	(183,337)	(155,773)
Purchases of limited partnership interests	0	(2,212)
Proceeds from sales or maturities of available-for-sale investments	166,964	164,534
Net sales of short-term investments	747	1,729
Other investing activities	1,039	(7,843)
Net cash provided by (used in) investing activities	(14,587)	435
Financing activities:
Dividends paid to shareholders	(7,530)	(7,496)
Drawings on line of credit	0	10,000
Net cash provided by (used in) financing activities	(7,530)	2,504
Effect of foreign exchange rates on cash and cash equivalents	(673)	(130)
Increase (decrease) in cash and cash equivalents	(8,627)	16,418
Cash and cash equivalents at beginning of period	64,632	59,297
Cash and cash equivalents at end of period	$ 56,005	$ 75,715