Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Southgate Homes [Member]	Centre Living [Member]
Retained Earnings (Accumulated Deficit)	$ 110,933
Stockholders' Equity Attributable to Noncontrolling Interest	$ 16,913
Common Stock, Shares, Issued	48,955,909
Common Stock, Value, Issued	$ 490
Treasury Stock, Shares	0
Treasury Stock, Common, Value	$ 0
Stockholders' Equity Attributable to Parent	384,572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Additional Paid in Capital	273,149
Balance at Dec. 31, 2017	433,038
Balance at Dec. 31, 2016	401,485
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of deferred share-based compensation	356
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	289
Contributions from noncontrolling interests	$ 438
Stock Issued During Period, Shares, Acquisitions	1,477,000
Common stock issued in connection with the investment in Challenger	$ (14,622)	$ (15)	$ (14,607)
Treasury Stock, Shares, Acquired	0
Treasury Stock, Value, Acquired, Cost Method	$ 0
Issuance of common stock under 2014 Equity Plan (in shares)	229,049
Issuance of common stock under 2014 Omnibus Equity Incentive Plan	$ 1,926	2	1,924
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ (586)	1	585
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	(63,057)
Distributions	$ (10,896)
Net income	25,206
Net Income (Loss) Attributable to Parent	14,970
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	10,236
Retained Earnings (Accumulated Deficit)	125,903
Stockholders' Equity Attributable to Noncontrolling Interest	$ 16,691
Common Stock, Shares, Issued	50,598,901
Common Stock, Value, Issued	$ 506
Treasury Stock, Shares	0
Treasury Stock, Value	$ 0
Stockholders' Equity Attributable to Parent	416,347
Additional Paid in Capital	289,938
Balance at Dec. 31, 2018	485,632
Balance at Dec. 31, 2017	433,038
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of deferred share-based compensation	404
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	288
Contributions from noncontrolling interests	$ 5
Treasury Stock, Shares, Acquired	(136,756)
Treasury Stock, Value, Acquired, Cost Method	$ (981)
Issuance of common stock under 2014 Equity Plan (in shares)	140,211
Issuance of common stock under 2014 Omnibus Equity Incentive Plan	$ 1,082	1	1,081
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ (412)	0	412
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	(39,228)
Distributions	$ (10,747)
Net income	64,535
Net Income (Loss) Attributable to Parent	51,623
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	11,332
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	62,955
Retained Earnings (Accumulated Deficit)	177,526
Stockholders' Equity Attributable to Noncontrolling Interest	$ 17,281
Common Stock, Shares, Issued	50,719,884
Common Stock, Value, Issued	$ 507
Treasury Stock, Shares	(136,756)
Treasury Stock, Value	$ 981
Treasury Stock, Common, Value	(981)
Stockholders' Equity Attributable to Parent	468,351
Additional Paid in Capital	291,299
Balance at Dec. 31, 2019	536,395
Balance at Dec. 31, 2018	485,632
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of deferred share-based compensation	489
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition	236
Contributions from noncontrolling interests	$ 3,600
Temporary Equity, Accretion to Redemption Value, Adjustment			(2,145)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent				$ (891)	$ (264)
Treasury Stock, Shares, Acquired	(255,183)
Treasury Stock, Value, Acquired, Cost Method	$ (2,186)
Issuance of common stock under 2014 Equity Plan (in shares)	219,181
Issuance of common stock under 2014 Omnibus Equity Incentive Plan	$ 1,466	3	1,463
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ (544)	$ 1	$ (543)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	(59,116)
Distributions	$ (10,993)
Net income	64,302
Net Income (Loss) Attributable to Parent	58,656
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	2,184
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	60,840
Retained Earnings (Accumulated Deficit)	$ 235,027
Common stock, shares authorized (in shares)	100,000,000
Stockholders' Equity Attributable to Noncontrolling Interest	$ 13,227
Common Stock, Shares, Issued	50,879,949
Common Stock, Value, Issued	$ 509
Treasury Stock, Shares	(391,939)
Treasury Stock, Value	$ 3,167
Treasury Stock, Common, Value	(3,167)
Stockholders' Equity Attributable to Parent	523,168
Additional Paid in Capital	$ 290,799