Revisions to Prior Period Financial Statements (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended									6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
(Provision) benefit for income taxes		$ (164)	$ (1,533)	$ 621	$ (2,139)	$ (672)	$ (3,633)	$ (654)	$ 58,389	$ (912)	$ (4,287)	$ (1,076)	$ (4,959)	$ 1,916	$ 7,098	$ (58,389)
Shareholders' equity balance	310,378				311,353				287,354					310,378	311,353	287,354	162,413
Consolidated Statement of Operations data:
Reimbursed costs incurred on behalf of managed communities		52,128	52,333	52,244	50,529	27,491	26,177	23,531		104,577	49,708	156,705	77,127	210,491	127,656	20,967
Total revenues	325,225	324,263	323,447	323,852	322,469	297,341	296,572	291,424		647,299	587,996	971,562	885,337	1,296,787	1,207,806	1,060,602
Other senior living operating expenses		67,942	64,843	65,455	67,693	65,139	64,237	64,680		130,298	128,917	198,240	194,056	265,764	261,749	248,547
Costs incurred on behalf of managed communities		52,128	52,333	52,244	50,529	27,419	26,177	23,531		104,577	49,708	156,705	77,127	210,491	127,656	20,967
General and administrative		15,334	15,059	15,456	16,229	14,678	15,459	15,451		30,515	30,910	45,849	45,588	63,509	61,817	57,540
Total operating expenses		321,909	317,736	320,184	317,466	292,454	286,394	288,651		637,920	575,045	959,829	867,499	1,286,525	1,184,965	1,043,256
Operating income	(1,471)	2,354	5,711	3,668	5,003	4,887	10,178	2,773		9,379	12,951	11,733	17,838	10,262	22,841	17,346
Income from continuing operations before income taxes and equity in earnings of an investee		725	4,409	2,496	3,682	3,287	8,852	1,551		6,905	10,403	7,630	13,690	5,031	17,372	17,027
(Provision) benefit for income taxes		(164)	(1,533)	621	(2,139)	(672)	(3,633)	(654)	58,389	(912)	(4,287)	(1,076)	(4,959)	1,916	7,098	(58,389)
Income from continuing operations	(3,324)	625	2,955	3,193	1,623	2,730	5,295	942		6,148	6,237	6,773	8,967	3,449	10,590	75,555
Net (loss) income	(5,430)	(758)	1,456	2,392	1,576	15,855	4,629	247		3,848	4,876	3,090	20,731	(2,340)	22,307	72,174
Basic income per share from:
Continuing operations (in dollars per share)		$ 0.01	$ 0.06	$ 0.07	$ 0.04	$ 0.05	$ 0.11	$ 0.02		$ 0.13	$ 130.00	$ 0.14	$ 0.19	$ 0.07	$ 0.23	$ 1.79
Discontinued operations (in dollars per share)		$ (0.03)	$ (0.03)	$ (0.02)		$ 0.28	$ (0.02)	$ (0.01)		$ (0.05)	$ (0.03)	$ (0.07)	$ 0.24	$ (0.12)	$ 0.24	$ (0.08)
Net income per share - basic (in dollars per share)	$ (0.11)	$ (0.02)	$ 0.03	$ 0.05	$ 0.04	$ 0.33	$ 0.09	$ 0.01		$ 0.08	$ 0.10	$ 0.07	$ 0.43	$ (0.05)	$ 0.47	$ 1.71
Diluted income per share from:
Continuing operations (in dollars per share)		$ 0.01	$ 0.06	$ 0.07	$ 0.03	$ 0.05	$ 0.10	$ 0.02		$ 0.13	$ 0.13	$ 0.14	$ 0.19	$ 0.07	$ 0.23	$ 1.70
Discontinued operations (in dollars per share)		$ (0.03)	$ (0.03)	$ (0.02)		$ 0.27	$ (0.01)	$ (0.01)		$ (0.05)	$ (0.03)	$ 0.07	$ 0.23	$ (0.12)	$ 0.23	$ (0.08)
Net income per share - diluted (in dollars per share)	$ (0.11)	$ (0.02)	$ 0.03	$ 0.05	$ 0.03	$ 0.32	$ 0.09	$ 0.01		$ 0.08	$ 0.10	$ 0.07	$ 0.42	$ (0.05)	$ 0.46	$ 1.62
Consolidated Balance Sheet data:
Due from related persons	11,659				7,957									11,659	7,957
Total current assets	150,884				159,686									150,884	159,686
Long term net deferred tax assets	41,830				37,560									41,830	37,560
Total assets	590,183				594,991									590,183	594,991
Accounts payable and accrued expenses	69,343				69,648									69,343	69,648
Due to related persons	20,587				20,504									20,587	20,504
Total current assets	198,528				202,950									198,528	202,950
Accumulated deficit	(48,996)				(46,656)									(48,996)	(46,656)
Total shareholders' equity	310,378				311,353				287,354					310,378	311,353	287,354	162,413
Total liabilities and shareholders' equity	590,183				594,991									590,183	594,991
As Previously Reported
(Provision) benefit for income taxes		(226)	(1,131)	775	(2,381)	(905)	(3,817)	(801)		(356)	(4,618)	(582)	(5,523)		(7,904)	57,849
Shareholders' equity balance					313,554										313,554
Consolidated Statement of Operations data:
Reimbursed costs incurred on behalf of managed communities		51,983	52,153	52,058	50,245	27,247	26,098	23,405		104,211	49,503	156,194	76,750		126,995	20,552
Total revenues		324,112	323,261	323,600	322,185	297,169	296,493	291,298		646,861	587,791	970,973	884,960		1,207,145	1,060,187
Other senior living operating expenses		68,227	65,752	66,338	67,113	64,579	63,797	64,260		132,090	128,057	200,317	192,636		259,749	249,491
Costs incurred on behalf of managed communities		51,983	52,153	52,058	50,245	27,247	26,098	23,405		104,211	49,503	156,194	76,750		126,995	20,552
General and administrative		15,081	15,451	15,132	16,197	14,647	15,434	15,499		30,583	30,933	45,664	45,580		61,777	57,443
Total operating expenses		321,594	318,610	320,338	316,570	291,691	285,850	288,153		638,948	574,003	960,542	865,694		1,182,264	1,043,688
Operating income		2,518	4,651	3,262	5,615	5,478	10,643	3,145		7,913	13,788	10,431	19,266		24,881	16,499
Income from continuing operations before income taxes and equity in earnings of an investee		889	3,349	2,090	4,294	3,878	9,317	1,923		5,439	11,240	6,328	15,118		19,412	16,180
(Provision) benefit for income taxes		(226)	(1,131)	775	(2,381)	(905)	(3,817)	(801)		(356)	(4,618)	(582)	(5,523)		(7,904)	57,849
Income from continuing operations		727	2,297	2,941	1,993	3,088	5,576	1,167		5,238	6,743	5,965	9,831		11,824	74,168
Net (loss) income		(198)	798	2,140	1,946	16,213	4,910	472		2,938	5,382	2,740	21,595		23,541	70,787
Basic income per share from:
Continuing operations (in dollars per share)		$ 0.02	$ 0.05	$ 0.06	$ 0.04	$ 0.06	$ 0.12	$ 0.02		$ 0.11	$ 0.14	$ 0.12	$ 0.21		$ 0.25	$ 1.76
Discontinued operations (in dollars per share)		$ (0.02)	$ (0.03)	$ (0.02)		$ 0.28	$ (0.02)	$ (0.01)		$ (0.05)	$ (0.03)	$ (0.06)	$ 0.24		$ 0.24	$ (0.08)
Net income per share - basic (in dollars per share)			$ 0.02	$ (0.04)	$ 0.04	$ 0.34	$ 0.10	$ 0.01		$ 0.06	$ 0.11	$ 0.06	$ 0.45		$ 0.49	$ 1.68
Diluted income per share from:
Continuing operations (in dollars per share)		$ 0.02	$ 0.05	$ 0.06	$ 0.04	$ 0.06	$ 0.11	$ 0.02		$ 0.11	$ 0.14	$ 0.12	$ 0.21		$ 0.25	$ 1.67
Discontinued operations (in dollars per share)		$ (0.02)	$ (0.03)	$ (0.02)		$ 0.27	$ (0.01)	$ (0.01)		$ (0.05)	$ (0.03)	$ (0.06)	$ 0.23		$ 0.23	$ (0.08)
Net income per share - diluted (in dollars per share)			$ 0.02	$ (0.04)	$ 0.04	$ 0.33	$ 0.10	$ 0.01		$ 0.06	$ 0.11	$ 0.06	$ 0.44		$ 0.48	$ 1.59
Consolidated Balance Sheet data:
Due from related persons					6,881										6,881
Total current assets					158,610										158,610
Long term net deferred tax assets					36,214										36,214
Total assets					592,569										592,569
Accounts payable and accrued expenses					66,045										66,045
Due to related persons					19,484										19,484
Total current assets					198,327										198,327
Accumulated deficit					(44,455)										(44,455)
Total shareholders' equity					313,554										313,554
Total liabilities and shareholders' equity					592,569										592,569
Accounts payable and certain other errors
Release of valuation allowance																867
Reduction in shareholders' equity balance																2,354
Accounts payable and certain other errors | Adjustments
(Provision) benefit for income taxes		62	(402)	(154)	242	233	184	147		(556)	331	(494)	564		806	540
Shareholders' equity balance					(2,201)										(2,201)
Consolidated Statement of Operations data:
Reimbursed costs incurred on behalf of managed communities		145	180	186	284	172	79	126		366	205	511	377		661	415
Total revenues		151	186	252	284	172	79	126		438	205	589	377		661	415
Other senior living operating expenses		(285)	(909)	(883)	580	560	440	420		(1,792)	860	(2,077)	1,420		2,000	(944)
Costs incurred on behalf of managed communities		145	180	186	284	172	79	126		366	205	511	377		661	415
General and administrative		253	(392)	324	32	31	25	(48)		(68)	(23)	185	8		40	97
Total operating expenses		315	(874)	(154)	896	763	544	498		(1,028)	1,042	(713)	1,805		2,701	(432)
Operating income		(164)	1,060	406	(612)	(591)	(465)	(372)		1,466	(837)	1,302	(1,428)		(2,040)	847
Income from continuing operations before income taxes and equity in earnings of an investee		(164)	1,060	406	(612)	(591)	(465)	(372)		1,466	(837)	1,302	(1,428)		(2,040)	847
(Provision) benefit for income taxes		62	(402)	(154)	242	233	184	147		(556)	331	(494)	564		806	540
Income from continuing operations		(102)	658	252	(370)	(358)	(281)	(225)		910	(506)	808	(864)		(1,234)	1,387
Net (loss) income		(560)	658	252	(370)	(358)	(281)	(225)		910	(506)	350	(864)		(1,234)	1,387
Basic income per share from:
Continuing operations (in dollars per share)		$ (0.01)	$ 0.01	$ 0.01		$ (0.01)	$ (0.01)			$ 0.02	$ (0.01)	$ 0.02	$ (0.02)		$ (0.02)	$ 0.03
Discontinued operations (in dollars per share)		$ (0.01)										$ (0.01)
Net income per share - basic (in dollars per share)		$ (0.02)	$ 0.01	$ 0.01		$ (0.01)	$ (0.01)			$ 0.02	$ (0.01)	$ 0.01	$ (0.02)		$ (0.02)	$ 0.03
Diluted income per share from:
Continuing operations (in dollars per share)		$ (0.01)	$ 0.01	$ 0.01	$ (0.01)	$ (0.01)	$ (0.01)			$ 0.02	$ (0.01)	$ 0.02	$ (0.02)		$ (0.02)	$ 0.03
Discontinued operations (in dollars per share)		$ (0.01)										$ (0.01)
Net income per share - diluted (in dollars per share)		$ (0.02)	$ 0.01	$ 0.01	$ (0.01)	$ (0.01)	$ (0.01)			$ 0.02	$ (0.01)	$ 0.01	$ (0.02)		$ (0.02)	$ 0.03
Consolidated Balance Sheet data:
Due from related persons					1,076										1,076
Total current assets					1,076										1,076
Long term net deferred tax assets					1,346										1,346
Total assets					2,422										2,422
Accounts payable and accrued expenses					3,603										3,603
Due to related persons					1,020										1,020
Total current assets					4,623										4,623
Accumulated deficit					(2,201)										(2,201)
Total shareholders' equity					(2,201)										(2,201)
Total liabilities and shareholders' equity					$ 2,422										$ 2,422