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Income Taxes (Details2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Taxes      
Income tax expense (benefit) at the statutory rate of 35% $ 16,373 $ 7,539 $ (13,278)
Changes resulting from-      
State income taxes, net of federal tax effect 1,910 1,011 (1,972)
Increase (decrease) in valuation allowance 1,465 455 3,431
Increase (decrease) in tax contingency reserves (145) 198 28
Increase (decrease) from noncontrolling interests (450) 565 (118)
Non-deductible expenses 594 481 386
Domestic production activity deduction (520) (378)  
Goodwill impairment     9,223
Purchase accounting adjustments (472) (210) (2,992)
Other (607) 384 (171)
Provision for income taxes $ 18,148 $ 10,045 $ (5,463)