Inventories Schedule of Inventory (Details) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Merchandise for Resale	$ 151,006	$ 152,194
Raw materials	19,603	20,609
Contracts and other work in process	196,652	205,220
Finished Goods (including certain general stock materials)	11,206	12,472
Inventory, Net	$ 378,467	$ 390,495