Stock-Based Compensation - Performance Stock Units Granted (Details) - Performance Shares $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) $ / shares shares
June 20, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base Period Revenues	$ 2,426,000
Threshold Goal, PSUs (in shares) | shares	155,889
Threshold Goal, Home Sale Revenues	$ 2,547,000
Target goal, PSUs (in shares) | shares	311,779
Target goal, Home Sale Revenues	$ 2,669,000
Maximum Goal, PSUs (in shares) | shares	623,557
Maximum Goal, Home Sale Revenues	$ 2,911,000
Fair Value per Share (in dollars per share) | $ / shares	$ 25.77
Maximum Potential Expense to be Recognized	$ 16,070
Maximum Remaining Expense to be Recognized	0
May 23, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base Period Revenues	$ 2,543,000
Threshold Goal, PSUs (in shares) | shares	157,464
Threshold Goal, Home Sale Revenues	$ 2,670,000
Target goal, PSUs (in shares) | shares	314,928
Target goal, Home Sale Revenues	$ 2,797,000
Maximum Goal, PSUs (in shares) | shares	629,856
Maximum Goal, Home Sale Revenues	$ 3,052,000
Fair Value per Share (in dollars per share) | $ / shares	$ 23.68
Maximum Potential Expense to be Recognized	$ 14,915
Maximum Remaining Expense to be Recognized	0
August 5, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base Period Revenues	$ 2,982,000
Threshold Goal, PSUs (in shares) | shares	145,800
Threshold Goal, Home Sale Revenues	$ 3,131,000
Target goal, PSUs (in shares) | shares	291,600
Target goal, Home Sale Revenues	$ 3,280,000
Maximum Goal, PSUs (in shares) | shares	583,200
Maximum Goal, Home Sale Revenues	$ 3,578,000
Fair Value per Share (in dollars per share) | $ / shares	$ 30.19
Maximum Potential Expense to be Recognized	$ 17,604
Maximum Remaining Expense to be Recognized	5,505
August 20, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base Period Revenues	$ 3,205,000
Threshold Goal, PSUs (in shares) | shares	145,800
Threshold Goal, Home Sale Revenues	$ 3,366,000
Target goal, PSUs (in shares) | shares	291,600
Target goal, Home Sale Revenues	$ 3,526,000
Maximum Goal, PSUs (in shares) | shares	583,200
Maximum Goal, Home Sale Revenues	$ 3,846,000
Fair Value per Share (in dollars per share) | $ / shares	$ 39.79
Maximum Potential Expense to be Recognized	$ 23,205
Maximum Remaining Expense to be Recognized	$ 19,755