Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Deferred compensation	$ 18,909	$ 19,105
Deferred rent and lease incentives	9,597	10,303
Net operating losses and credits	7,071	10,535
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	2,350	2,663
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	2,863	1,104
Deferred Tax Assets, Tax Deferred Expense, Auction Rate Securities Reserves	1,007	540
Involuntary conversion	1,692	1,670
Deferred Tax Assets, Tax Deferred Expense, Depreciation	370	500
Other	1,067	1,177
Total deferred tax assets	44,926	47,597
Valuation allowance	3,204	1,350
Deferred tax assets after valuation allowance	41,722	46,247
Deferred tax liabilities:
Goodwill	41,049	40,534
Partnership investments	8,227	9,184
Company-owned life insurance	6,277	7,426
Other	252	195
Deferred Tax Liabilities, Gross	55,805	57,339
Total deferred tax liabilities	$ (14,083)	$ (11,092)