|
Common Stock Options, Restricted Stock, Warrants And Changes In Capitalization (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0月结束 | 12个月结束 | 0月结束 | 12个月结束 | 1月结束 | 12个月结束 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
12月. 05, 2011
|
7月. 15, 2011
|
3月. 30, 2011
|
2010年5月25日
|
12月. 31, 2011
|
12月. 31, 2010
|
12月. 05, 2011
普通股〔成员〕
|
7月. 15, 2011
普通股〔成员〕
|
3月. 30, 2011
普通股〔成员〕
|
2010年5月25日
普通股〔成员〕
|
2010年5月19日
普通股〔成员〕
|
12月. 31, 2011
普通股〔成员〕
2005 Stock Incentive Plan [Member]
|
12月. 31, 2011
普通股〔成员〕
1999 Stock Option Plan [Member]
|
12月. 31, 2004
普通股〔成员〕
1999 Stock Option Plan [Member]
|
4月. 19, 2006
普通股〔成员〕
股票期权〔成员〕
|
4月. 20, 2006
普通股〔成员〕
股票期权〔成员〕
|
3月. 31, 2004
Private Placement Offering [Member]
|
3月. 31, 2002
Private Placement Offering [Member]
年
|
12月. 31, 2011
Private Placement Offering [Member]
|
|
| Common Stock Options, Restricted Stock, Warrants And Changes In Capitalization [Line Items] | |||||||||||||||||||
| Customary work week number of hours, minimum | 40 | ||||||||||||||||||
| Number of shares available for grant | 883,000 | ||||||||||||||||||
| Options granted for the purchase of shares | 997,269 | 627,337 | |||||||||||||||||
| Stock that may be issued under incentive plan before the amendment | 1,904,606 | ||||||||||||||||||
| Stock that may be issued under incentive plan after the amendment | 3,000,000 | ||||||||||||||||||
| Option granted prior to new stock option plan | 627,337 | ||||||||||||||||||
| 公开发行价格 | $ 29.00 | $ 28.75 | $ 32.00 | $ 13.50 | |||||||||||||||
| Issuance of common stock in public offering, shares | 4,600,000 | 3,450,000 | 2,760,000 | 187,022 | 1,481,481 | ||||||||||||||
| Number of shares of common stock to purchase for each warrant | 250 | ||||||||||||||||||
| 普通股，票面价值 | $ 0.01 | $ 0.01 | $ 0.01 | ||||||||||||||||
| Proceeds from the sale of shares | $ 128.0 | $ 94.7 | $ 84.3 | $ 21.6 | |||||||||||||||
| Private placement offering units | 10,000 | ||||||||||||||||||
| Preferred stock dividend rate | 12.00% | 12.00% | 15.00% | 12.00% | |||||||||||||||
| 签发认股权证 | 2,322,962 | ||||||||||||||||||
| Exercise price of warrants issued | $ 1.19 | ||||||||||||||||||
| 认股权证优秀 | 8,875 | ||||||||||||||||||
| 认股权证期限 | 10 | ||||||||||||||||||
| Warrants converted into common stock | 29,832 | ||||||||||||||||||