Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 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
	September 30, 2012	Level 1	Level 2	Level 3
Available-for-sale securities	$          20,321	$            20,321	-	-
Intangible and other long-term assets
Non-qualified deferred compensation assets	$          11,265	$                 825	$            10,440	-
Interest rate swap	$            1,039	-	$              1,039	-
Accounts payable
Non-qualified deferred compensation liabilities	$            2,425	-	$              2,425	-
Contingent consideration	$          10,815	-	-	$            10,815
Other long-term liabilities
Non-qualified deferred compensation liabilities	$          13,230	-	$            13,230	-
	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	-