Financial Instruments - Effective Portion of Unrealized Gain and Loss (Details) (Interest rate swaps, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest rate swaps
Derivatives designated as cash flow hedges:
Effective portion recognized in accumulated OCL, gain/(loss)	$ 0	$ (455)	$ 0	$ 290
Amounts reclassified from accumulated OCL, gain/(loss)	96	171	288	504
Derivative, Gain (Loss) on Derivative, Net	362		300
Gain/(loss) on derivative		$ 0		$ 0