|
Quarterly Financial Information (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2012
|
Sep. 30, 2012
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Quarterly Financial Information | |||||||||||
| Total revenue | $ 271,303 | $ 267,151 | $ 254,172 | $ 246,032 | $ 243,089 | $ 239,568 | $ 231,218 | $ 222,495 | $ 1,038,660 | $ 936,087 | $ 842,820 |
| Income (loss) from continuing operations | 68,237 | 84,432 | 58,409 | 53,674 | 48,278 | 42,410 | 33,229 | 28,579 | 264,756 | 152,400 | 92,055 |
| Total discontinued operations | 54,147 | 2,315 | 98,412 | 3,935 | 274,687 | 2,267 | 9,963 | 1,958 | 158,806 | 288,970 | 82,024 |
| Net income attributable to common stockholders | $ 122,356 | $ 86,844 | $ 156,909 | $ 57,758 | $ 323,085 | $ 44,824 | $ 43,373 | $ 30,341 | $ 423,869 | $ 441,622 | $ 175,331 |
| Net income per common share - basic | $ 1.19 | $ 0.89 | $ 1.64 | $ 0.61 | $ 3.40 | $ 0.49 | $ 0.50 | $ 0.35 | $ 4.34 | $ 4.89 | $ 2.08 |
| Net income per common share - diluted | $ 1.19 | $ 0.89 | $ 1.63 | $ 0.60 | $ 3.38 | $ 0.49 | $ 0.49 | $ 0.35 | $ 4.32 | $ 4.87 | $ 2.07 |
| X | ||||||||||
|
- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|