Discontinued Operations (Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Oct. 23, 2013 item	Oct. 23, 2012	Sep. 06, 2012
Discontinued Operations [Abstract]
Sale of DAS networks to ExteNet, discontinued operations, total consideration			$ 119.3
Sale of DAS networks to ExteNet, discontinued operations, cash amount		5.7	94.3
Sale of DAS networks to ExteNet, discontinued operations, promissory note			$ 25.0
Number of additional networks sold	1