Note 7. Related-party Transactions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Selling, general and administrative expenses	$ 17,839	[1]	$ 14,397	[2]	$ 37,488	[3]	$ 27,001	[4]
IHCAffiliatedEntityMember
Selling, general and administrative expenses	$ 229		$ 210		$ 478		$ 439

[1] $5,195 from related parties

[2] $6,437 from related parties

[3] $10,556 from related parties

[4] $9,501 from related parties