Derivative Instruments and Hedging Activities (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Ria Operations [Member] | Foreign Currency Gain (Loss) [Member]
Derivative Instruments, Loss [Line Items]
Gain (loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 2,259	$ (1,923)	$ (1,080)	$ (34)