DESCRIPTION OF BUSINESS AND NATURE OF OPERATIONS: (Details) (USD $)	12 Months Ended						12 Months Ended					0 Months Ended	12 Months Ended		12 Months Ended				0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 IPO [Member]	Jul. 23, 2013 IPO [Member]	Jul. 23, 2013 UCP LLC [Member]	Dec. 31, 2013 Subsidiaries [Member]	Dec. 31, 2012 Subsidiaries [Member]	Dec. 31, 2011 Subsidiaries [Member]	Jul. 23, 2013 Subsidiaries [Member]	Jul. 21, 2013 Subsidiaries [Member]	Jul. 23, 2013 Series A Units [Member]	Dec. 31, 2013 Common Class A [Member]	Dec. 31, 2013 Common Class B [Member]	Dec. 31, 2013 Member Units [Member]	Dec. 31, 2012 Member Units [Member]	Dec. 31, 2011 Member Units [Member]	Dec. 31, 2013 Common stock [Member] Common Class A [Member]	Jul. 23, 2013 Common stock [Member] Common Class B [Member]	Dec. 31, 2013 Common stock [Member] Common Class B [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jul. 23, 2013 Restricted Stock Units (RSUs) [Member] Long-Term Incentive Plan [Member]	Dec. 31, 2013 Land Development [Member]	Dec. 31, 2012 Land Development [Member]	Dec. 31, 2011 Land Development [Member]	Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member]
Property, Plant and Equipment [Line Items]
Common Stock, par value (in dollars per share)					$ 0.01								$ 0.01	$ 0.01
Proceeds from IPO (net of offering costs)	$ 105,454,000	$ 0	$ 0															$ 105,500,000
Economic interest percentage						42.30%
Cash contributions from member	37,512,000	41,005,000	30,531,000												(37,512,000)	(41,005,000)	(30,531,000)
Repayments of member contributions	25,443,000	34,700,000	18,311,000												(25,443,000)	(34,700,000)	(18,311,000)
Allocated expenses							600,000	1,200,000	900,000
Allocated expenses payable	0.6	0	0
Issuance of common (in shares)																		7,750,000	100	100
Share Price (in dollars per share)				$ 15
Ownership percentage										57.70%	100.00%
Preferred stock, shares authorized	50,000,000
Shares reclassified during the period (in shares)												10,593,000
Economic interest held by common stock													100.00%
Stock exchange ratio	1
Contingent exchangeable shares													18,343,000
Percentage of cash payment from subsidiary for increases in tax basis	85.00%
Tax receivable agreement period	15 years
Tax receivable agreement, variable discount rate																										1.00%
Percentage of cash savings realized from increase in tax basis	15.00%
Ownership percentage, for right to nominate two individuals for election to board of directors	25.00%
Ownership percentage, for right to nominate one individual for election to board of directors	10.00%
Impairment charges	$ 0	$ 0	$ 5,184,000																				$ 0	$ 0	$ 5,200,000
Shares granted in period (in shares)																					430,333	430,333