Goodwill & Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Goodwill & Intangible Assets [Abstract]
Amortization Expense	$ 4,900	$ 4,200	$ 15,000	$ 13,200
Amortization Expense Recorded in Cost of Sales	1,400	$ 1,600	4,500	$ 4,700
Accumulated Amortization	$ 95,587		$ 95,587		$ 78,126