Earnings (loss) Per Common Share (Reconciliation of Earnings (loss) Per Common Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic
Net income	$ 2,615	$ 6,744	$ 26,472	$ 4,359
Weighted-average shares, outstanding	61,881	59,898	61,743	56,045
Income per share	$ 0.04	$ 0.11	$ 0.43	$ 0.08
Diluted
Net income	2,615	6,744	26,472	4,359
Effect of dilutive securities	0	0	0	0
Net income (loss) available to common shareholders after assumed conversion	$ 2,615	$ 6,744	$ 26,472	$ 4,359
Weighted average shares:
Weighted-average shares, outstanding	61,881	59,898	61,743	56,045
Diluted effect of stock options, restricted stock, and restricted stock unit awards	944	1,530	952	1,477
Weighted-average shares, Diluted	62,825	61,428	62,695	57,522
Income per share	$ 0.04	$ 0.11	$ 0.42	$ 0.08