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Consolidaiton Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Net income $ 288 $ 1,467 $ 18,381 $ 21,967
Unrealized holding gains arising during period 5,101 19,563 17,974 18,957
Non-credit portion of other-than-temporary impairments recognized in other comprehensive income 75 272 313 389
Amortization of net unrealized gains on held-to-maturity securiites (443) (817) (959) (1,581)
Less: reclassification adjustment for gains included in net income (142) (1,393) (2,975) (5,130)
Total unrealized gains on investment securities 4,591 17,625 14,353 12,635
Amortization of net actuarial loss included in net income 905 718 1,808 1,436
Amortization of prior service cost included in net income 24 25 49 49
Total defined benefit pension plans 929 743 1,857 1,485
Other comprehensive income 5,520 18,368 16,210 14,120
Comprehensive income $ 5,808 $ 19,835 $ 34,591 $ 36,087