Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Summary of financial assets and liabilities measured at fair value on recurring basis

			Fair Value Measurements at Reporting Date Using
	March 31, 2012		Level 1		Level 2		Level 3
Intangible and other long-term assets
Non-qualified deferred compensation assets	$	11,183	$	820	$	10,363		—
Accounts Payable
Non-qualified deferred compensation liabilities	$	2,727		—	$	2,727		—
Contingent consideration	$	6,251		—	$	—	$	6,251
Other long-term liabilities
Non-qualified deferred compensation liabilities	$	12,875		—	$	12,875		—
	December 31, 2011		Level 1		Level 2		Level 3
Intangible and other long-term assets
Non-qualified deferred compensation assets	$	10,597	$	815	$	9,782		—
Interest rate swap	$	1,904		—	$	1,904		—
Accounts Payable
Non-qualified deferred compensation liabilities	$	2,790	$	—	$	2,790		—
Other long-term liabilities
Non-qualified deferred compensation liabilities	$	12,975		—	$	12,975		—