Weighted Average Shares Outstanding Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 13,641	$ 1,419	$ (6,913)	$ (20,563)
Weighted average common shares outstanding, basic	39,115	38,829	39,033	38,720
Weighted average common shares outstanding, diluted	39,807	39,769	39,033	38,720
Basic (in dollars per share)	$ 0.35	$ 0.04	$ (0.18)	$ (0.53)
Diluted (in dollars per share)	$ 0.34	$ 0.04	$ (0.18)	$ (0.53)