Basis Of Presentation And Significant Accounting Policies (Summary Of Table Reconciling Basic And Diluted Net Income Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Basic Earnings Per Share, Net income	$ 22,214	$ 16,797	$ 17,016	$ 16,433	$ 5,726	$ 11,896	$ 10,523	$ 10,069	$ 72,460		$ 38,214		$ 13,737
Less: Preferred stock dividends and accretion of discount									0		0		3,892
Net income available to common stockholders									72,460		38,214		9,845
Basic Earnings Per Share, Weighted average common shares outstanding	94,463,000	94,492,000	94,479,000	94,433,000	86,804,000	86,795,000	86,786,000	86,752,000	94,467,000		86,785,000		71,314,000
Basic Earnings Per Share	$ 0.23	$ 0.18	$ 0.18	$ 0.17	$ 0.07	$ 0.13	$ 0.12	$ 0.12	$ 0.76		$ 0.44		$ 0.14
Diluted Earnings Per Share, Net income available to common stockholders									$ 72,460		$ 38,214		$ 9,845
Diluted Earnings Per Share, Weighted average common shares outstanding									94,467,000		86,785,000		71,314,000
Effect of dilutive securities: Restricted stock									285,000	[1]	132,000	[1]	44,000	[1]
Effect of dilutive securities: Stock options									20,000	[2]	11,000	[2]	9,000	[2]
Diluted Earnings Per Share, Weighted average shares outstanding	94,866,000	94,785,000	94,701,000	94,670,000	87,005,000	86,931,000	86,911,000	86,797,000	94,772,000		86,928,000		71,367,000
Diluted Earnings Per Share	$ 0.23	$ 0.18	$ 0.18	$ 0.17	$ 0.07	$ 0.13	$ 0.12	$ 0.12	$ 0.76		$ 0.44		$ 0.14
Outstanding options									4,606		5,995		6,032
Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities were not included in the computation of net income per diluted share									6		56		231

[1] 6, 56 and 231 shares of restricted stock and restricted stock units were not included in the computation of net income per diluted share at December 31, 2011, 2010 and 2009, respectively, because the effect would be antidilutive.

[2] Options to purchase 4,606 shares, 5,995 shares and 6,032 shares outstanding at December 31, 2011, 2010, and 2009, respectively, were not included in the computation of net income per diluted share because the exercise price of these options was greater than the average maket price of the common shares and, therefore, the effect would be antidilutive.