Consolidated Statement of Changes in Equity (Unaudited) (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common dividends declared per share (in dollars per share)	$ 0.45
Preferred dividends declared per share (in dollars per share)	$ 1.00
Issuance of shares of common stock (in shares)	12,697,865
Shares Issued in lieu of directors' fees	11,432
Issuance of shares pursuant to the TPG Management Services Agreement (in shares)	19,123
Shares of restricted stock withheld to satisfy tax withholding obligations on vesting of restricted stock (in shares)	2,769