Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Land	$ 10,410	$ 10,410
Buildings	88,256	83,642
Machinery, equipment and fixtures	433,652	438,388
Leasehold improvements	209,612	205,018
Construction in progress	36,728	13,517
Property, plant and equipment, gross	778,658	750,975
Less accumulated depreciation	(544,994)	(519,852)
Property, plant and equipment, net	$ 233,664	$ 231,123