Note 9. Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Notes payable	$ 2,200	$ 2,200
Unamortized original issue discount	(292)	(287)
Obligations under leases	6,284	6,422
Western revolver	906	980
Total current portion of notes payable and other borrowings	9,098	9,315
Notes payable	215,050	216,150
Unamortized original issue discount	(1,547)	(1,694)
Obligations under leases	94,232	98,139
Total long-term notes payable and other borrowings	$ 307,735	$ 312,595