Goodwill and Other Intangible Assets (Intangibles,Net) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, gross	$ 106,354	$ 104,168
Less accumulated amortization	33,003	26,613
Intangible assets subject to amortization, net	73,351	77,555
Customer relationships
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, gross	88,576	87,139
Non-Compete agreements
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, gross	13,752	13,004
Trade names
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, gross	1,939	1,939
Other intangible assets
Summary Of Significant Accounting Policies [Line Items]
Intangible assets subject to amortization, gross	$ 2,086	$ 2,086