Note 9. Stockholders' Equity (Details) - Statement of Stockholders’ Equity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended					6 Months Ended
	Jun. 30, 2013	Jun. 24, 2012	Jun. 30, 2013	Jun. 24, 2012	Jun. 30, 2013 Common Stock [Member] Common Class A [Member]	Jun. 30, 2013 Common Stock [Member] Common Class B [Member]	Dec. 31, 2012 Common Stock [Member] Common Class B [Member]	Jun. 30, 2013 Additional Paid-in Capital [Member]	Jun. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Jun. 30, 2013 Retained Earnings [Member]	Jun. 30, 2013 Total Equity [Member]
Note 9. Stockholders' Equity (Details) - Statement of Stockholders’ Equity [Line Items]
Balance at December 31, 2012 (in Shares)					27,215,117
Balance at December 31, 2012			$ (176,224)		$ 136,076	$ 2,743	$ 2,743	$ 23,024	$ (219,656)	$ (118,411)	$ (176,224)
Net loss	(16,146)	(146,296)	(33,841)	(180,720)						(33,841)	(33,841)
Other comprehensive income, net of taxes	647		2,572						2,572		2,572
Exercise of stock options (in Shares)					179,476
Exercise of stock options					897			(156)			741
Performance accelerated restricted stock (in Shares)					(42,143)
Performance accelerated restricted stock					(211)			30			(181)
Stock-based compensation								481			481
Other (in Shares)					112
Other					1			80			81
Balance at June 30, 2013 (in Shares)					27,352,562
Balance at June 30, 2013	$ (206,371)		$ (206,371)		$ 136,763	$ 2,743	$ 2,743	$ 23,459	$ (217,084)	$ (152,252)	$ (206,371)