Unaudited Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Unaudited Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities	$ 31,110	$ 34,822
Investing activities:
Purchases of available-for-sale investments	(201,523)	(273,675)
Purchases of limited partnership interests	(4,212)	0
Proceeds from sales or maturities of available-for-sale investments	204,979	302,726
Net sales (purchases) of short-term investments	1,726	(218)
Other investing activities	(9,744)	(20,308)
Net cash provided by (used in) investing activities	(8,774)	8,525
Financing activities:
Dividends paid to shareholders	(11,222)	(11,227)
Drawings on line of credit	10,000	0
Net cash used in financing activities	(1,222)	(11,227)
Effect of foreign exchange rates on cash and cash equivalents	(835)	(282)
Increase in cash and cash equivalents	20,279	31,838
Cash and cash equivalents at beginning of period	59,297	71,549
Cash and cash equivalents at end of period	$ 79,576	$ 103,387