Supplemental Balance Sheet Information

The composition of net trade receivables is as follows:



	June 30, 2012			December 31, 2011
Client receivables	$	181,363		$	159,381
Unbilled revenue	30,682			29,446
Total	212,045			188,827
Less allowance for doubtful accounts	(3,999		)	(4,017		)
Net trade receivables	$	208,046		$	184,810

The composition of inventories is as follows:



	June 30, 2012		December 31, 2011
Raw materials and supplies	$	13,076	$	13,987
Work in process	16,548		13,533
Finished products	62,659		65,449
Inventories	$	92,283	$	92,969

The composition of other current assets is as follows:



	June 30, 2012		December 31, 2011
Prepaid assets	$	24,659	$	22,828
Deferred tax asset	26,265		30,894
Marketable securities	6,623		5,359
Prepaid income tax	17,271		19,742
Restricted cash	229		229
Other current assets	$	75,047	$	79,052

The composition of net property, plant and equipment is as follows:



	June 30, 2012			December 31, 2011
Land	$	40,482		$	40,517
Buildings	699,041			696,275
Machinery and equipment	337,820			332,683
Leasehold improvements	38,689			29,975
Furniture and fixtures	27,932			26,775
Vehicles	3,140			5,226
Computer hardware and software	104,959			105,563
Construction in progress	45,798			57,661
Total	1,297,861			1,294,675
Less accumulated depreciation	(570,456		)	(556,645		)
Net property, plant and equipment	$	727,405		$	738,030

Depreciation is calculated for financial reporting purposes using the straight-line method based on the estimated useful lives of the assets. Depreciation expense for the six month ended June 30, 2012 and June 25, 2011 was $31,161 and $31,904, respectively.

The composition of other assets is as follows:



	June 30, 2012		December 31, 2011
Deferred financing costs	$	7,677	$	9,239
Cash surrender value of life insurance policies	20,273		25,057
Long term marketable securities	—		11,051
Other assets	13,449		12,312
Other assets	$	41,399	$	57,659

The composition of other current liabilities is as follows:



	June 30, 2012		December 31, 2011
Accrued income taxes	$	10,854	$	10,552
Current deferred tax liability	1,342		1,379
Accrued interest and other	2,171		2,102
Other current liabilities	$	14,367	$	14,033

The composition of other long-term liabilities is as follows:



	June 30, 2012		December 31, 2011
Deferred tax liability	$	15,416	$	16,074
Long-term pension liability	40,866		49,223
Accrued Executive Supplemental Life Insurance Retirement Plan and Deferred Compensation Plan	26,112		25,739
Other long-term liabilities	16,925		17,415
Other long-term liabilities	$	99,319	$	108,451