Derivative Instruments (Narrative) (Details)	3 Months Ended				3 Months Ended	12 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2015 JPY (¥)	Dec. 31, 2014 contract	Mar. 31, 2015 Other Comprehensive Income (Loss) [Member] USD ($)	Dec. 31, 2014 Other Comprehensive Income (Loss) [Member] USD ($)	Mar. 31, 2015 Foreign Exchange Contract 1 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 1 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 1 [Member] MXN	Mar. 31, 2015 Foreign Exchange Contract 2 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 2 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 2 [Member] MXN	Mar. 31, 2015 Foreign Exchange Contract 3 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 3 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 3 [Member] MXN
Derivative Instruments, Gain (Loss) [Line Items]
Maximum potential future exposure on derivatives	$ 7,100,000
Derivative Loss	2,810,000	14,000
Unrealized loss related to derivative instruments included in accumulated other comprehensive loss					600,000	3,700,000
Number of forward purchase contracts				3
Notional amount of forward purchase contracts	$ 30,019,000						$ 675,000	$ 900,000		$ 675,000	$ 900,000		$ 450,000	$ 600,000
Exchange rate			102.25						13.6007			13.7503			14.1934
Projected Peso exposure represented by Mexican Peso foreign exchange contracts (in hundredths)	85.00%