Equity (Details Textual) - USD ($) $ in Thousands, shares in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Equity (Textual) [Abstract]
Equity increase during the period	$ 1,759,000
Common stock value authorized for repurchase	$ 5,000,000
Common stock shares authorized remaining or repurchase	1.3
Common stock shares repurchased	0.1	1.2
Purchase of treasury stock	$ 42,193	$ 336,905