Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of Useful Lives for Property and Equipment

Useful lives for major categories of property and equipment are as follows:

Buildings and land improvements	30 to 40 years
Building improvements	3 to 10 years
Furniture, fixtures, equipment and purchased software	3 to 10 years