Pension (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Pension [Abstract]
Expected pension expense	$ 459			$ 459
Pension Contributions				0
Pension settlement expense			$ 564
Pension expense	$ 116	$ 318		$ 344	$ 490	$ 922