Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 28, 2014	Dec. 31, 2013
Trade accounts and notes receivable, allowance for doubtful accounts	$ 1,929	$ 1,779
Property, plant and equipment, accumulated depreciation	300,041	283,815
Intangible assets, Accumulated amortization	$ 121,193	$ 109,468
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	139,328,852	138,734,442
Common stock, shares outstanding	139,328,852	138,734,442