Goodwill & Intangible Assets, Net (Summary of Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization, Finite-Lived Intangible Assets	$ (82,856)	$ (95,882)
Net Carrying Amount, Finite-Lived Intangible Assets	68,795
Intangible assets, gross	155,556	178,179
Intangible assets, net	72,700	82,297
Capitalized Software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-Lived Intangible Assets	142,358	162,700
Accumulated Amortization, Finite-Lived Intangible Assets	(74,530)	(82,596)
Net Carrying Amount, Finite-Lived Intangible Assets	67,828	80,104
Patents, Copyrights And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-Lived Intangible Assets	6,438	6,892
Accumulated Amortization, Finite-Lived Intangible Assets	(5,471)	(5,135)
Net Carrying Amount, Finite-Lived Intangible Assets	967	1,757
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-Lived Intangible Assets	2,855	8,290
Accumulated Amortization, Finite-Lived Intangible Assets	(2,855)	(8,151)
Net Carrying Amount, Finite-Lived Intangible Assets	0	139
In Progress [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite lived intangible assets	3,616	0
Trademarks and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite lived intangible assets	$ 289	$ 297