Initial Public Offering (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended
	Aug. 14, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Subsequent Event [Line Items]
Stock issued (shares)	7,000,000
Share price (dollars per share)	$ 14.00
Proceeds from IPO	$ 55,821			$ 55,821	$ 0
Underwriting fees	4,324
IPO expenses incurred, but not yet paid		596		596
Conversion of preferred stock (shares)	7,191,891
Management services agreement termination fee paid to Gores		9,000		9,000
Other IPO transaction-related costs		322		1,008
IPO expenses	1,620	9,322	0	10,008	0
Debt repayment [Member]
Subsequent Event [Line Items]
Proceeds from IPO	46,821
Termination of management services agreement [Member]
Subsequent Event [Line Items]
Proceeds from IPO	9,000
Accounts Payable [Member]
Subsequent Event [Line Items]
IPO expenses incurred, but not yet paid		347		347
Accrued Expenses and Other Liabilities [Member]
Subsequent Event [Line Items]
IPO expenses incurred, but not yet paid		$ 249		$ 249
Shares Offered By Company [Member]
Subsequent Event [Line Items]
Stock issued (shares)	4,411,765
Shares sold by Gores Building Holdings, LLC and other selling stockholders [Member]
Subsequent Event [Line Items]
Stock issued (shares)	2,588,235
Shares purchased by underwriters [Member]
Subsequent Event [Line Items]
Stock issued (shares)	1,050,000
Aggregate shares sold [Member]
Subsequent Event [Line Items]
Stock issued (shares)	8,050,000