Amortizable Intangible Assets (Schedule Of Amortizable Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 10,837	$ 7,237
Accumulated amortization	(5,742)	(4,299)
Intangible assets, net	5,095	2,938
Amortization expense	1,400	1,300	$ 1,900
Total write off depreciated amortizable intangible assets and related accumulated amortization		1,800
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	3,300
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	5,365	5,065
Cell Phone Tower Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	1,408	1,408
Home Plans [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 764	$ 764