CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Trading Securities, Amortized Cost Basis	$ 80,193	$ 90,339
Available-for-sale Securities, Amortized Cost Basis	473,908	469,650
Held-to-maturity Securities, Fair Value	$ 93,785	$ 92,458
STOCKHOLDERS’ EQUITY
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	50,000,000	50,000,000
Common Stock, Shares, Issued	19,462,483	19,454,965
Common Stock, Shares, Outstanding	19,428,143	19,420,625
Common Stock, Shares Held in Employee Trust, Shares	34,340	34,340