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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]      
Income tax expense (benefit), continuing operations, adjustment of deferred tax (asset) liability     $ 11,500
Stockholders' equity, effects of tax law changes     0
Earliest Tax Year | Federal      
Income Taxes [Line Items]      
Open tax year   2015  
Earliest Tax Year | State      
Income Taxes [Line Items]      
Open tax year   2015  
Metropolitan      
Income Taxes [Line Items]      
Operating loss carryforwards   $ 33,800  
Retained Earnings      
Income Taxes [Line Items]      
Stockholders' equity, effects of tax law changes     3,016
Retained Earnings | New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2018-02      
Income Taxes [Line Items]      
Stockholders' equity, effects of tax law changes $ 3,000    
AOCI      
Income Taxes [Line Items]      
Stockholders' equity, effects of tax law changes     $ (3,016)
AOCI | New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2018-02      
Income Taxes [Line Items]      
Stockholders' equity, effects of tax law changes $ (3,000)