Income Taxes (Details) - Latest Tax Year	3 Months Ended
	Mar. 31, 2018
Internal Revenue Service (IRS)
Income Tax [Line Items]
Tax Year Closed	2012
TEXAS
Income Tax [Line Items]
Tax Year Closed	2012
NEW MEXICO
Income Tax [Line Items]
Tax Year Closed	2012
ARIZONA
Income Tax [Line Items]
Tax Year Closed	2012