|**Goodwill (Tables)**                                     | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|--------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|**Goodwill [Abstract]**                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Schedule Of Goodwill                                      | ﻿﻿﻿
				
				Regulated﻿
				
				Segment
				
				Other
				
				Consolidated﻿Balance at December 31, 2017
				
				$
				37,389
				
				$
				4,841
				
				$
				42,230﻿Goodwill acquired
				
				
				25
				
				
				-
				
				
				25﻿Reclassification to utility plant acquisition adjustment
				
				
				(25)
				
				
				-
				
				
				(25)﻿Other
				
				
				(180)
				
				
				-
				
				
				(180)﻿Balance at June 30, 2018
				
				$
				37,209
				
				$
				4,841
				
				$
				42,050
		﻿
|﻿                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
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|﻿                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|﻿                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|﻿Balance at December 31, 2017                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|﻿Goodwill acquired                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|﻿Reclassification to utility plant acquisition adjustment |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|﻿Other                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|﻿Balance at June 30, 2018                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

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