Furniture, Equipment And Leasehold Improvements (Components Of Furniture, Equipment And Leasehold Improvements) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment [Line Items]
Total	$ 34,927	$ 26,225
Less: Accumulated Depreciation and Amortization	(13,490)	(11,302)
Furniture, Equipment and Leasehold Improvements, Net	21,437	14,923
Depreciation and amortization expense for Furniture, Equipment and Leasehold improvements	3,431	2,380	2,304
Furniture And Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Total	7,137	5,877
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total	19,890	13,995
Computer And Computer-Related Equipment [Member]
Property, Plant and Equipment [Line Items]
Total	$ 7,900	$ 6,353

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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