XML 58 R4.htm IDEA: XBRL DOCUMENT v2.4.0.6
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Statement of Income and Comprehensive Income [Abstract]    
Unrealized gain (loss) on investments, tax $ 3,475 $ 535
Pension liability adjustments, tax $ 491 $ 363