Equity (Comprehensive Income) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Equity [Abstract]
Prior service cost	$ 689	$ 718
Transition asset	33	65
Unrecognized net actuarial loss	(11,322)	(11,595)
Derivative, Fair Value, Net	(632)	(1,082)
Total accumulated other comprehensive income (loss)	$ (11,232)	$ (11,894)