Retirement Benefit Plans (Amount Recognized in the Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued expenses and other liabilities	$ (18,586)	$ (42,276)
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued expenses and other liabilities	(11,806)	(10,518)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued expenses and other liabilities	$ (3,852)	$ (3,853)