Information on Business Segments Details 1 (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Assets	$ 2,075,023	$ 2,061,866
Aerospace [Member]
Segment Reporting Information [Line Items]
Assets	646,021	654,147
Industrial [Member]
Segment Reporting Information [Line Items]
Assets	1,253,637	1,241,206
Other [Member]
Segment Reporting Information [Line Items]
Assets	$ 175,365	$ 166,513