Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Components of Property and equipment
Property and equipment, Gross	$ 424,104	$ 410,819
Accumulated depreciation	(307,072)	(294,478)
Total property and equipment	117,032	116,341
Computer hardware and software [Member]
Components of Property and equipment
Property and equipment, Gross	209,832	196,168
Signage [Member]
Components of Property and equipment
Property and equipment, Gross	83,801	80,303
Agent equipment [Member]
Components of Property and equipment
Property and equipment, Gross	69,121	69,643
Office furniture and equipment [Member]
Components of Property and equipment
Property and equipment, Gross	36,062	36,733
Leasehold improvements [Member]
Components of Property and equipment
Property and equipment, Gross	24,878	27,562
Land [Member]
Components of Property and equipment
Property and equipment, Gross	$ 410	$ 410

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 of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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