Unaudited Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Unaudited Consolidated Statements of Cash Flows [Abstract]
Net cash provided by operating activities	$ 13,609	$ 10,862
Investing activities:
Purchases of available-for-sale investments	(155,773)	(160,345)
Purchases of limited partnership interests	(2,212)	0
Proceeds from sales or maturities of available-for-sale investments	164,534	219,268
Net sales (purchases) of short-term investments	1,729	(25)
Other investing activities	(7,843)	(17,396)
Net cash provided by investing activities	435	41,502
Financing activities:
Dividends paid to shareholders	(7,496)	(7,512)
Drawings on line of credit	10,000	0
Net cash provided by (used in) financing activities	2,504	(7,512)
Effect of foreign exchange rates on cash and cash equivalents	(130)	(481)
Increase in cash and cash equivalents	16,418	44,371
Cash and cash equivalents at beginning of period	59,297	71,549
Cash and cash equivalents at end of period	$ 75,715	$ 115,920