Subsequent Events (Details) (USD $)	12 Months Ended					2 Months Ended				1 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Term Loan - Variable Rate [Member]	Dec. 31, 2012 Term Loan - Variable Rate [Member]	Feb. 20, 2014 Subsequent Event [Member] Common Stock [Member]	Feb. 24, 2014 Subsequent Event [Member] Common Stock [Member]	Jan. 31, 2014 Subsequent Event [Member] Term Loan - Variable Rate [Member]	Dec. 31, 2013 Subsequent Event [Member] Term Loan - Variable Rate [Member]	Jan. 31, 2014 Subsequent Event [Member] Revolving Credit Facility [Member]	Dec. 31, 2013 Subsequent Event [Member] Revolving Credit Facility [Member]	Jan. 31, 2014 Subsequent Event [Member] Line of Credit Working Capital [Member]	Jan. 31, 2014 Subsequent Event [Member] Vista Capri [Member] Unit
Subsequent Event [Line Items]
Units in the community													106
Sales price of communities sold													$ 14,400,000
Line of credit facility, current borrowing capacity										600,000,000	1,000,000,000
Line of credit with an accordion option										1,500,000,000		25,000,000
Line of credit facility expiration date										Dec. 31, 2017
Line of credit facility extension period										18 months		2 years
Debt instrument, description of variable rate basis										LIBOR		LIBOR
Basis spread on variable rate, initial (in hundredths)								1.05%	1.20%	0.95%		0.95%
Unsecured debt	1,410,023,000	1,112,084,000		350,000,000	350,000,000				350,000,000
Common stock, shares issued (in shares)	37,421,219	36,442,994					462,555
Net proceeds from issuance of common stock	$ 138,366,000	$ 357,720,000	$ 323,931,000			$ 74,900,000
Average price of stock sold (in dollars per share)							$ 162.97