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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	Note 14. Subsequent Events On July 10, 2017, we agreed to the guaranteed maximum price terms of an agreement with our construction manager for the construction of the office building that will serve as part of our principal headquarters. The total cost of the project will not exceed $100 million, which amount is subject to change based on agreed-upon changes to the scope of work. The expected date for substantial completion of the project is January 2020.