Organization and Basis of Presentation Systems Implementation Expense (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Systems implementation expense	$ 1,177,000	$ 142,000	$ 3,352,000	$ 157,000