Acquisition and Divestiture Activities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Acquisitions
Acquisition of business, net of cash acquired	$ 23,034	$ 85,493	$ 19,335
MCB Industrie [Member]
Business Acquisitions
Acquisition of business, net of cash acquired	23,034
Finite-lived Intangible Assets Acquired	5,433
Goodwill related to acquisitions	7,985
HiRel Systems [Member]
Business Acquisitions
Acquisition of business, net of cash acquired		85,493
Finite-lived Intangible Assets Acquired		43,950
Goodwill related to acquisitions		25,815
Huntington Electric Inc [Member]
Business Acquisitions
Acquisition of business, net of cash acquired			19,335
Goodwill related to acquisitions			$ 9,051