Equity (Comprehensive Income) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Equity [Abstract]
Prior service cost	$ 674	$ 718
Transition asset	15	65
Unrecognized net actuarial loss	(11,184)	(11,595)
Derivative, Fair Value, Net	(1,406)	(1,082)
Total accumulated other comprehensive income (loss)	$ (11,901)	$ (11,894)