Income Taxes - Summary of Reconciles Provision for Income Taxes (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Reconciliation of federal statutory tax rate to effective rate | |||
| Statutory U.S. federal income tax rate | 35.00% | 35.00% | 35.00% |
| Income passed through to Partners | (12.43%) | (12.43%) | (25.57%) |
| State and local income taxes | 18.50% | 15.60% | 6.92% |
| Permanent items | (2.18%) | (3.69%) | (0.00%) |
| Life insurance proceeds | (0.00%) | (0.00%) | (5.41%) |
| Other | (0.29%) | 2.87% | 0.13% |
| Effective income tax rate | 38.60% | 37.35% | 11.07% |