Financial Instruments Foreign Exchange Summary (Details) (Not Designated as Hedging Instrument, Foreign Exchange Contract)
|
Mar. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Mar. 31, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
|
Mar. 31, 2014
Japanese Yen
USD ($)
|
Mar. 31, 2014
Japanese Yen
JPY (¥)
|
Dec. 31, 2013
Japanese Yen
USD ($)
|
Dec. 31, 2013
Japanese Yen
JPY (¥)
|
Mar. 31, 2014
Pound Sterling
USD ($)
|
Mar. 31, 2014
Pound Sterling
GBP (£)
|
Dec. 31, 2013
Pound Sterling
USD ($)
|
Dec. 31, 2013
Pound Sterling
GBP (£)
|
||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Derivative [Line Items] | ||||||||||||||||
Carrying Amount | $ 25,285,000 | [1] | $ 25,090,000 | $ 23,150,000 | [1] | $ 24,742,000 | $ 1,403,000 | $ 1,374,000 | $ 23,882,000 | $ 23,716,000 | ||||||
Notional Amount | ¥ 144,830,000 | ¥ 144,717,000 | £ 14,332,000 | £ 14,311,000 | ||||||||||||
|