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Note 8. Related-party Transactions (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Selling, general and administrative expenses $ 12,604 [1] $ 8,593 [2]
IHCAffiliatedEntityMember
   
Selling, general and administrative expenses $ 229 $ 307
[1] $3,063 from related parties
[2] $3,120 from related parties