CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - $ / shares	Mar. 31, 2022	Dec. 31, 2021
Stockholders' equity:
Preferred stock, Series A, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Series A, liquidation value (in dollars per share)	$ 25.00	$ 25.00
Preferred stock, Series A, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, Series A, shares issued (in shares)	5,299,200	5,299,200
Preferred stock, Series A, shares outstanding (in shares)	5,299,200	5,299,200
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	41,610,939	41,610,939
Common stock, shares outstanding (in shares)	39,459,909	39,877,833
Treasury stock (in shares)	2,151,030	1,733,106