Consolidated Balance Sheet (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Bank Holding Company Accounting [Member]
Preferred stock, shares authorized	1,000,000
Preferred stock, par value	$ 0.01
Preferred stock, shares outstanding	0
Common stock, shares authorized	50,000,000
Common stock, par value	$ 0.01
Common stock, shares issued	27,390,066
Treasury stock,shares	2,951,243
Investment Company Accounting [Member]
Preferred stock, shares authorized		1,000,000
Preferred stock, par value		$ 0.01
Preferred stock, shares outstanding		0
Common stock, shares authorized		50,000,000
Common stock, par value		$ 0.01
Common stock, shares issued		27,294,327
Treasury stock,shares		2,951,243