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Stock Incentive Plans (Tables) | 3 Months Ended
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Mar. 31, 2012
Stock Incentive Plans [Abstract] |
Summary Of Information Concerning Restricted Stock Awards |
|  | Three Months Ended March 31, |
|  | 2012 |  |  | 2011 |
|  | Awards |  |  | Weighted Average Grant Price |  |  | Awards |  |  | Weighted Average Grant Price |
Unvested awards outstanding at beginning of period |  |  | 1,846,115 |  |  | $ | 8.44 |  |  |  | 1,309,489 |  |  | $ | 8.52 |
Granted |  |  | 275,674 |  |  |  | 12.28 |  |  |  | 384,372 |  |  |  | 10.10 |
Vested |  |  | (165,284 | ) |  |  | 8.01 |  |  |  | (170,247 | ) |  |  | 13.63 |
Forfeited |  |  | (126,301 | ) |  |  | 8.32 |  |  |  | (671 | ) |  |  | 7.71 |
Dividend reinvestment |  |  | 15,474 |  |  |  | 12.22 |  |  |  | 13,913 |  |  |  | 10.04 |
Unvested awards outstanding at end of period |  |  | 1,845,678 |  |  |  | 9.09 |  |  |  | 1,536,856 |  |  |  | 8.37 |
Components Of The Restricted Stock Awards |
|  | Service- Based Awards |  |  | Performance- Based Awards |  |  | Total |
Unvested awards |  |  | 489,918 |  |  |  | 1,355,760 |  |  |  | 1,845,678 |
Unrecognized compensation expense |  | $ | 2,436 |  |  | $ | 5,620 |  |  | $ | 8,056 |
Intrinsic value |  | $ | 5,918 |  |  | $ | 16,378 |  |  | $ | 22,296 |
Weighted average remaining life (in years) |  |  | 2.38 |  |  |  | 2.63 |  |  |  | 2.56 |
Summary Of Information Concerning Stock Option Awards |
|  | Three Months Ended March 31, |
|  | 2012 |  |  | 2011 |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Shares |  |  | Weighted Average Exercise Price |
Options outstanding at beginning of period |  |  | 586,020 |  |  | $ | 14.93 |  |  |  | 770,610 |  |  | $ | 14.28 |
Acquired from Parkvale |  |  | 627,808 |  |  |  | 10.41 |  |  |  | — |  |  |  | — |
Exercised |  |  | (36,385 | ) |  |  | 7.67 |  |  |  | (8,389 | ) |  |  | 2.68 |
Forfeited |  |  | (227,737 | ) |  |  | 14.04 |  |  |  | (120,207 | ) |  |  | 11.65 |
Options outstanding and exercisable at end of period |  |  | 949,706 |  |  |  | 12.43 |  |  |  | 642,014 |  |  |  | 14.93 |

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Additional Disclosures [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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