10. Other Income and Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest and investment income	$ (14,700)	$ (10,100)	$ (13,500)
Net realized (gains) losses on investments	(800)	(1,600)	0
Other-than-temporary impairment losses on investments	600	600	400
Nonoperating Income (Expense)	0	0	100
Other (income) expense, net	$ 14,850	$ 11,080	$ 13,009