Derivative Instruments (Narrative) (Details)	1 Months Ended		3 Months Ended	12 Months Ended
	Mar. 31, 2014 USD ($) contract	Dec. 31, 2013 JPY (¥) contract	Mar. 31, 2014 Other Comprehensive Income (Loss) [Member] USD ($)	Dec. 31, 2013 Other Comprehensive Income (Loss) [Member] USD ($)	Mar. 31, 2014 Foreign Exchange Contracts [Member]	Aug. 31, 2013 Foreign Exchange Contract 1 [Member] USD ($)	Aug. 31, 2013 Foreign Exchange Contract 1 [Member] MXN	Nov. 30, 2013 Foreign Exchange Contract 2 [Member] USD ($)	Nov. 30, 2013 Foreign Exchange Contract 2 [Member] MXN
Derivative Instruments, Gain (Loss) [Line Items]
Maximum potential future exposure on derivatives	$ 4,000,000
Unrealized loss related to derivative instruments included in accumulated other comprehensive loss			4,300,000	4,300,000
Number of forward purchase contracts	0	2
Number of foreign currency derivatives held		3
Notional amount of forward purchase contracts		¥ 3,300,000,000				$ 1,200,000		$ 600,000
Exchange rate		102.53					13.6103		13.3003
Projected Peso exposure represented by Mexican Peso foreign exchange contracts (in hundredths)					60.00%
Number of expired contracts	1