Property And Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2016

Property And Equipment, Net [Abstract]

Schedule Of Estimated Useful Lives For Property And Equipment

Asset Classification	Estimated Useful Life
Land improvements	15 to 20 years
Buildings and improvements	10 to 40 years
Leasehold improvements	Shorter of remaining lease term or useful life of improvements
Machinery and equipment	3 to 8 years
Office furniture and equipment	3 to 7 years
Computer hardware and software	3 to 7 years

Schedule Of Property And Equipment

	December 31,		December 31,
		2016		2015
Land and improvements	$	7,255	$	7,357
Buildings and improvements		171,455		162,146
Leasehold improvements		44,568		40,526
Machinery and equipment		262,718		224,100
Office furniture and equipment		42,124		39,334
Computer hardware and software		189,327		169,615
Construction in progress		25,145		35,546
		742,592		678,624
Less accumulated depreciation and amortization		385,170		345,598
Total property and equipment, net	$	357,422	$	333,026

Summary Of Depreciation And Amortization, Capitalized Computer Software For Internal Use And Unpaid Property Equipment Reflected In Account Payable And Accrued Expenses

	December 31,		December 31,		December 31,
		2016		2015		2014
Depreciation and amortization expense	$	63,537	$	57,029	$	48,783
Capitalized computer software developed for internal use		15,590		19,081		11,871
Unpaid property and equipment, reflected in accounts payable and accrued liabilities		10,601		8,534		6,513