XML 22 R42.htm IDEA: XBRL DOCUMENT v2.4.0.6
Equity (Details Textual) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Equity (Textual) [Abstract]    
Dividends declared per common share $ 0.21 $ 0.21
Unrealized gain (loss) due to fair value adjustments on interest rate swap agreements, tax $ 375 $ 1,936
Unrealized gain (loss) due to fair value adjustments on available-for-sale securities, tax $ 2,550 $ 729