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CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
Unrealized gain on interest rate swaps, taxes	$ 1,912
Reclassification of net losses on auction rate securities from OCI to net income, taxes	125
Unrealized loss on Retirement Plan, net of taxes	$ 177

Tax effect on the reclassification adjustment for losses realized upon the write-down of securities.

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- Definition

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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