Intangible Assets and Goodwill (Goodwill Information) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Gross Carrying Amount	$ 138,669	$ 138,669
Goodwill, Impaired, Accumulated Impairment Loss	(21,770)	(21,770)
Net Carrying Amount	116,899	116,899	$ 116,899
MID
Goodwill [Line Items]
Goodwill, Fair Value Disclosure	19,905	19,905	19,905
Gross Carrying Amount	19,905	19,905
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Net Carrying Amount	19,905	19,905	19,905
CRD
Goodwill [Line Items]
Goodwill, Fair Value Disclosure	96,994	96,994	96,994
Gross Carrying Amount	96,994	96,994
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Net Carrying Amount	96,994	96,994	$ 96,994
Other
Goodwill [Line Items]
Gross Carrying Amount	21,770	21,770
Goodwill, Impaired, Accumulated Impairment Loss	(21,770)	(21,770)
Net Carrying Amount	$ 0	$ 0