Subsequent Event - Acquisition (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Subsequent Event [Member]
Subsequent Event [Line Items]
Business acquisition, effective date of acquisition	Mar. 14, 2014
Business acquisition, name of acquired entity	Laser Design, Inc. (LDI)
Business acquisition, approximate revenue of acquired entity	$ 6.0
All-cash payment to acquire entity	$ 2.7