Derivative Financial Instruments (Details) (Foreign exchange contracts [Member]) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2014 USD ($)	Sep. 30, 2014 GBP (£)	Sep. 30, 2014 JPY (¥)
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 12.0	£ 3.3	¥ 116.0
Maximum maturity period	1 year	1 year	1 year

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant