CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
(1) Net of income tax benefit (expense) of unrealized holding gains/(losses) on securities	$ 19,000	$ 3,500,000
(2) Net of income tax benefit (expense) of reclassification adjustment for gains included in net income	$ 200,000	$ 1,100,000