Summary of Significant Accounting Policies - Summary of Estimated Service Lives for Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2016
Furniture and fixtures | Minimum
Accounting Policies [Line Items]
Estimated Useful Life	5 years
Furniture and fixtures | Maximum
Accounting Policies [Line Items]
Estimated Useful Life	10 years
Office equipment | Minimum
Accounting Policies [Line Items]
Estimated Useful Life	2 years
Office equipment | Maximum
Accounting Policies [Line Items]
Estimated Useful Life	7 years
Transportation and service equipment | Minimum
Accounting Policies [Line Items]
Estimated Useful Life	2 years
Transportation and service equipment | Maximum
Accounting Policies [Line Items]
Estimated Useful Life	10 years
Major equipment | Minimum
Accounting Policies [Line Items]
Estimated Useful Life	2 years
Major equipment | Maximum
Accounting Policies [Line Items]
Estimated Useful Life	10 years
Tenant improvements | Minimum
Accounting Policies [Line Items]
Estimated Useful Life	5 years
Tenant improvements | Maximum
Accounting Policies [Line Items]
Estimated Useful Life	25 years
Buildings
Accounting Policies [Line Items]
Estimated Useful Life	7 years