Condensed Parent Company Financial Statements (Condensed Balance Sheets (Additional Information)) (Details) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	85,177,172	85,177,172
Treasury stock, shares	5,003,127	5,020,025
Unallocated common stock held by ESOP, shares	79,548	109,950
Parent Company
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	85,177,172	85,177,172
Treasury stock, shares	5,003,127	5,020,025
Unallocated common stock held by ESOP, shares	79,548	109,950