Goodwill And Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014
Goodwill And Intangible Assets [Abstract]
Balance at December 31, 2013	$ 193,510
Preliminary purchase price allocations for acquisitions (Note 7)	28,279
Purchase accounting adjustments	(193)
Balance at March 31, 2014	$ 221,596

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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