XML 73 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes (Reconciliation between Federal statutory tax rate and effective tax rate reflected in accompanying financial statements) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Mar. 25, 2017
Mar. 26, 2016
Reconciliation between Federal statutory tax rate and effective tax rate reflected in accompanying financial statements          
Federal income tax based on statutory tax rate applied to income before taxes [1]   $ 32,692   $ 34,035 $ 36,897
State income tax, net of federal income tax benefit   2,218   2,700 2,306
Tax act [2]   4,707      
Other   (98)   (1,017) (587)
Income tax expense, total   $ 39,519   $ 35,718 $ 38,616
Federal income tax based on statutory tax rate applied to income before taxes, percentage   31.60% [1] 35.00% 35.00% [1] 35.00% [1]
State income tax, net of federal income tax benefit, percentage   2.10%   2.80% 2.20%
Tax act, percentage [2]   4.50%      
Other, percentage       (1.10%) (0.60%)
Income tax expense, percentage   38.20%   36.70% 36.60%
Scenario, Forecast [Member]          
Reconciliation between Federal statutory tax rate and effective tax rate reflected in accompanying financial statements          
Federal income tax based on statutory tax rate applied to income before taxes, percentage 21.00%        
[1] For fiscal 2018, represents the blended rate of 35% for 9/12 of the year and 21% for 3/12 of the year.
[2] Represents the net discrete adjustment to income tax expense from the remeasurement of our net deferred tax assets at the lower U.S. corporate income tax rate.