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Consolidation Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Net income $ 21,308 $ 18,093
Unrealized holding gains arising during period 2,394 12,873
Non-credit portion of other-than-temporary impairment losses recognized in other comprehensive income 24 238
Amortization of net unrealized gains on held-to-maturity securiites (413) (516)
Less: reclassification adjustment for gains included in net income (3,937) (2,833)
Total unrealized gains on investment securities (1,932) 9,762
Net actuarial gain 28,600 0
Amortization of net actuarial loss included in net income 1,196 903
Amortization of prior service cost included in net income 6 25
Curtailment expense included in net income 11 0
Total defined benefit pension and post-retirement plans 29,813 928
Other comprehensive income 27,881 10,690
Comprehensive income $ 49,189 $ 28,783