Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator (both basic and diluted):
Net income (loss)	$ 9,931	$ (6,956)	$ 10,467	$ (28,530)
Denominator:
Denominator for basic earnings per share	41,477,139	40,400,082	41,103,660	40,494,628
Stock options	83,790		109,914
Unvested restricted stock	651,984		540,780
Denominator for diluted earnings per share	42,212,913	40,400,082	41,754,354	40,494,628
Basic earnings per common share:	$ 0.24	$ (0.17)	$ 0.25	$ (0.70)
Diluted earnings per common share:	$ 0.24	$ (0.17)	$ 0.25	$ (0.70)