Income Taxes (Components of Provision) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Taxes [Abstract]                      
Current Federal Tax Expense (Benefit)                 $ 9,112 $ 9,045 $ 9,377
Current State and Local Tax Expense (Benefit)                 1,325 1,143 1,025
Current Income Tax Expense (Benefit), Total                 10,437 10,188 10,402
Deferred Federal Income Tax Expense (Benefit)                 (811) (3,077) (6,243)
Deferred State and Local Income Tax Expense (Benefit)                 143 46 (12)
Deferred Income Tax Expense (Benefit), Total                 (668) (3,031) (6,255)
Income Tax Expense (Benefit), Total $ 2,084 $ 2,870 $ 2,469 $ 2,346 $ 2,064 $ 2,183 $ 1,872 $ 1,038 $ 9,769 $ 7,157 $ 4,147