Related Party Transactions - Summary of Related Party Transactions (Detail) (Affiliated Entity [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Tax, utility, insurance and other reimbursement	$ 115	$ 10	$ 167	$ 103
Rent expense	257	305	519	448
Capital assets acquired	27	15	74	15
Total	$ 399	$ 330	$ 760	$ 566