Goodwill And Other Intangible Assets (Acquired Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 70,956	$ 49,494
Accumulated Amortization	(33,701)	(28,020)
Net	37,255	21,474
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	21,607	18,033
Accumulated Amortization	(14,571)	(12,968)
Net	7,036	5,065
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	48,391	30,515
Accumulated Amortization	(18,383)	(14,440)
Net	30,008	16,075
Trademarks and other[Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	958	946
Accumulated Amortization	(747)	(612)
Net	$ 211	$ 334