XML 26 R52.htm IDEA: XBRL DOCUMENT v2.4.0.6
Effective Income Tax Reconciliation (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income tax expense based on U.S. federal statutory income tax rate $ 46,403 $ 28,687 $ (10,634)
Partnership loss (income) not deductible (includible) from (in) corporate income (21,273) (16,188) 4,115
State and local taxes, net of federal income tax benefit 3,455 1,938 (930)
Valuation allowance (6,030) (10,460) 4,425
Tax credits (2,100) (1,791) (2,706)
Nondeductible expenses and other 2,165 743 481
Provision (benefit) pertaining to corporate subsidiaries $ 22,620 $ 2,929 $ (5,249)