Accounts Receivable Factoring (Narrative) (Details) $ in Thousands, € in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 EUR (€)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Receivables [Abstract]
Amount of factoring permitted per credit facility agreements					€ 15.0	$ 16,600
Accounts receivables sold						13,400	$ 10,500
Receivables transferred to the factor			$ 21,200	$ 28,900
Proceeds from sale of accounts receivables			19,900	38,800
Outstanding balances on accounts receivable						$ 10,200	$ 10,400
Related losses on sale	$ 30	$ 70	$ 70	$ 110