Related Party Transactions - Additional Information (Detail) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2013	Sep. 04, 2012
Related Party Transactions [Abstract]
Company contribution to a multi employer 401K plan at discretionary amount of employee's cash compensation, maximum percentage	6.00%
Company contribution to a multi employer 401K plan at discretionary amount of employee's cash compensation, amount	$ 281,800	$ 282,000
Deferred compensation, employee contribution, percentage	2.00%
Deferred compensation, company contribution, amount	107,700	162,000
Number of times the employer contribution is higher than the amount deferred by employees	300.00%
Deferred compensation, cumulative unfunded liability	1,700,000			1,600,000
Ancillary costs and expenses	5,500,000	4,700,000
Liability due to The Saul Organization for the Company's share of these ancillary costs and expenses	440,600			499,000
Operating Leases, Extended Expiration Period			5 years
Percentage of annual increase in base rent			3.00%
Rent expense	630,000	637,000
Insurance Commissions and fees expense	288,800	283,000
Monthly consulting fees					60,000
Consulting fees	$ 495,000	$ 540,000