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Related Party Transactions - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Sep. 04, 2012 USD ($)
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 | $ 400,000 | $ 379,000 | $ 369,000 |
Deferred compensation, employee contribution, percentage | 2.00% |  |  |
Deferred compensation, employer contribution, percentage | 3 | 3 | 3 |
Deferred compensation, company contribution, amount | $ 224,900 | $ 192,800 | $ 191,300 |
Deferred compensation, cumulative unfunded liability | 1,800,000 | 1,800,000 |  |
Ancillary costs and expenses | 8,200,000 | 7,400,000 | 6,300,000 |
Liability due to the Saul Organization for the company's share of these ancillary costs and expenses | 655,000 | 543,000 |  |
Insurance commissions and fees expense | $ 443,500 | 427,300 | 447,300 |
Monthly consulting fees |  |  |  | $ 60,000
Consulting fees |  | $ 495,000 | $ 720,000 |

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