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Note 7. Related-party Transactions (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Selling, general and administrative expenses $ 18,065us-gaap_SellingGeneralAndAdministrativeExpense [1] $ 19,649us-gaap_SellingGeneralAndAdministrativeExpense [2]
IHCAffiliatedEntityMember    
Selling, general and administrative expenses $ 172us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= fil_IHCAffiliatedEntityMember
$ 248us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= fil_IHCAffiliatedEntityMember
[1] $5,805 from related parties
[2] $5,361 from related parties