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Income Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax [Line Items]      
Deferred income tax expense, exclusive of the effects of other components listed below $ 7,409 $ 9,981 $ 1,085
Adjustments to deferred tax assets and liabilities for changes in enacted tax laws and rates 0 0 (1)
Tax benefits of operating loss carryforwards 0 (1,130) 0
Increase in the beginning-of-the-year balance of the valuation allowance for deferred tax assets 0 0 5,406
Deferred income tax expense $ 7,409 $ 8,851 $ 6,490