Property, Plant And Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant And Equipment

Summary Of Property, Plant And Equipment [Table Text Block]

		Lives (years)		2017		2016
Land		-	$	1,630	$	1,643
Buildings and improvements		2-44		36,319		35,036
Central office equipment1		3-10		94,076		92,954
Cable, wiring and conduit		15-50		67,695		79,279
Satellites		14-17		2,967		2,710
Other equipment		3-20		90,017		88,436
Software		3-5		16,750		14,472
Under construction		-		4,045		5,118
				313,499		319,648
Accumulated depreciation and amortization				188,277		194,749
Property, plant and equipment - net			$	125,222	$	124,899
1	Includes certain network software.