9. Other Income and Expenses (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest and investment income	$ (8,500,000)	$ (7,800,000)	$ (9,200,000)	$ (9,100,000)
Net realized gains on investments	0	0	0	(200,000)
Miscellaneous other expense (income) items, net	100,000	(800,000)	200,000	(700,000)
Other (income) expense, net	$ 8,388,000	$ 8,644,000	$ 9,049,000	$ 10,044,000