XML 23 R12.htm IDEA: XBRL DOCUMENT v3.5.0.2
Taxes
6 Months Ended
Jun. 30, 2016
Taxes [Abstract]  
Taxes
(6) Taxes:
As of June 30, 2016, the Company's calendar years 2015 and 2014 remain subject to examination by the IRS.  The effective federal income tax rate differs from the normal statutory rate primarily as a result of tax-exempt investment income.