Indemnification Obligations (Narrative) (Details) (Indemnification Agreement [Member]) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Source Photonics [Member] USD ($)	Mar. 31, 2013 Pedrena [Member] USD ($)	Mar. 31, 2013 Pedrena [Member] EUR (€)	Dec. 31, 2012 Pedrena [Member] USD ($)
Loss Contingencies [Line Items]
Indemnification claims deductible	$ 1.0
Indemnification claims cap	20.0
Representations and warranties agreement, cash threshold		20
Representations and warranties agreement, potential escrow deposit			€ 1.5	$ 2.0