CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Investment securities available-for-sale, Amortized Cost	$ 822,163	$ 849,139
Preferred Stock, Par or Stated Value 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, Par or Stated Value Per Share	$ 0	$ 0
Common stock, Authorized shares	40,000,000	40,000,000
Common stock, issued shares	25,641,887	25,641,887
Cost of common stock in treasury, shares	1,319,377	1,399,261