Business Segments Business Segments - Textuals (Details) $ in Thousands	3 Months Ended						12 Months Ended			36 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)
Business Segments - Textuals [Abstract]
Number of Operating Segments							16
Purchase Accounting Adjustments	$ 598	$ 692	$ 2,961	$ 896			$ 5,147
Charges related to stucco-related claims	1,000					$ 8,500	0	$ 8,500	$ 19,409	$ 28,400
Total valuation adjustments and write-offs	5,809				$ 7,681		5,809	$ 7,681	$ 3,992
Assets Held-for-sale, Not Part of Disposal Group	$ 5,600						$ 5,600