Employee Benefit Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Benefit Plans [Abstract]
Employee contribution percent	50.00%	50.00%	50.00%
Maximum percentage of employee contribution to the plan	6.00%	6.00%	6.00%
Company's matching contribution	$ 1,560,000	$ 1,367,000	$ 1,222,000
Discretionary contributions made	0	0	0
Total contributions to retirement plan	$ 243,000	$ 205,000	$ 101,000