Goodwill and Other Intangible Assets (Goodwill And Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Gross	$ 1,901,574		$ 1,899,159	$ 877,239
Goodwill, Impaired, Accumulated Impairment Loss	(112,934)		(112,934)	(112,934)
Goodwill, Total	1,788,640		1,786,225	764,305
Goodwill, Net additions	2,415		1,021,920
Other Intangible Assets, Gross	113,471		113,471	58,909
Other Intangible Assets, Accumulated Amortization	(59,544)		(56,738)	(46,531)
Other Intangible Assets, Net	53,927		56,733	12,378
Other Intangible Assets, Net additions	0		54,562
Other Intangible Assets, Amortization	$ (2,806)	$ (1,194)	$ (10,207)