CONDENSED CONSOLIDATED STATEMENTS OF CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Available-for-sale securities, at amortized cost	$ 1,415,557	$ 1,390,255
Held-to-maturity securities, at fair value	150,139	146,686
Other borrowings, at fair value	$ 10,518	$ 10,576
Common Stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, authorized	25,000,000	25,000,000
Common Stock, issued	15,059,686	15,015,594
Treasury stock, shares	111,924	116,126