CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Investment securities available-for-sale, amortized cost (in dollars)		$ 773,195	$ 776,057
Preferred stock; no par value (in dollars per share)		$ 0	$ 0
Preferred stock, Authorized shares		10,000,000	10,000,000
Preferred stock, issued shares		0	0
Preferred stock, outstanding shares		0	0
Common stock; no par value (in dollars per share)		$ 0	$ 0
Common stock, Authorized shares		40,000,000	40,000,000
Common stock, issued shares	[1]	28,206,076	28,206,076
Cost of common stock in treasury, shares	[1]	2,009,732	1,957,386

[1] *Share data and June 30, 2015 common stock and retained earnings gives retrospective recognition to a 10% stock dividend declared on July 22, 2015.