Note 6. Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Land	$ 161,578	$ 160,697
Buildings	156,748	156,909
Land and leasehold improvements	164,121	165,042
Equipment	199,790	199,934
Construction in progress	3,207	3,478
Property and equipment, gross	685,444	686,060
Less accumulated depreciation and amortization	(365,952)	(353,736)
Property and equipment, net	$ 319,492	$ 332,324