Note 15. Commitments and Contingencies (Details) - Lease Commitments (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Rent Expense	$ 14,400,000	$ 19,200,000	$ 16,100,000
Operating Leases, Future Minimum Payments Due, Next Twelve Months	12,225,000
Operating Leases, Future Minimum Payments, Due in Two Years	11,610,000
Operating Leases, Future Minimum Payments, Due in Three Years	11,231,000
Operating Leases, Future Minimum Payments, Due in Four Years	11,135,000
Operating Leases, Future Minimum Payments, Due in Five Years	8,352,000
Operating Leases, Future Minimum Payments, Due Thereafter	6,930,000
Total Minimum Operating Lease Payments	61,483,000
Operating Leases, Future Minimum Payments, Due Next Twelve Months, Sublease Rentals	(1,552,000)
Operating Leases, Future Minimum Payments, Due in Two Years, Sublease Rentals	(1,449,000)
Operating Leases, Future Minimum Payments, Due in Three Years, Sublease Rentals	(1,449,000)
Operating Leases, Future Minimum Payments, Due in Four Years, Sublease Rentals	(1,449,000)
Operating Leases, Future Minimum Payments, Due in Five Years, Sublease Rentals	(906,000)
Operating Leases, Future Minimum Payments, Due Thereafter, Sublease Rentals	0
Capital Leases Future Minimum Payments Due in 2013	569,000
Capital Leases Future Minimum Payments Due in 2014	569,000
Capital Leases Future Minimum Payments Due in 2015	519,000
Capital Leases Future Minimum Payments Due in 2016	129,000
Capital Leases Future Minimum Payments Due after 2016	173,000
Total Minimum Capital Lease Payments	2,533,000
Less Amounts Representing Interest	(492,000)
Present Value of Minimum Lease Payments	2,041,000
Less Current Portion of Obligations Under Capital Leases	(362,000)
Noncurrent Portion of Obligations Under Capital Leases	1,679,000
Aggregate Leases, Future Minimum Payments, Due in Next Twelve Months	11,247,000
Aggregate Leases, Future Minimum Payments, Due in Two Years	10,730,000
Aggregate Leases, Future Minimum Payments, Due in Three Years	10,351,000
Aggregate Leases, Future Minimum Payments, Due in Four Years	10,205,000
Aggregate Leases, Future Minimum Payments, Due in Five Years	7,575,000
Aggregate Leases, Future Minimum Payments, Due Thereafter	7,103,000
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals	(6,805,000)
Net Operating Leases, Future Minimum Payments Due, Next Twelve Months	10,673,000
Net Operating Leases, Future Minimum Payments, Due in Two Years	10,161,000
Net Operating Leases, Future Minimum Payments, Due in Three Years	9,782,000
Net Operating Leases, Future Minimum Payments, Due in Four Years	9,686,000
Net Operating Leases, Future Minimum Payments, Due in Five Years	7,446,000
Net Operating Leases, Future Minimum Payments, Due Thereafter	6,930,000
Net Operating Leases, Future Minimum Payments Due	54,678,000
Capital Leases, Future Minimum Payments Due, Next Twelve Months	574,000
Aggregate Leases Future Minimum Payments Due	$ 57,211,000