Segment Information (Financial Information) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating Revenues	$ 443,885	$ 417,708
Depreciation and Amortization	46,843	49,219
Operating Income/(Loss)	67,071	21,204
Equity in (Losses)/Earnings of Affiliates, Net of Tax	512	(422)
Net Income/(Loss) From Continuing Operations	33,806	1,733
Capital Expenditures	23,776	32,967
Assets	4,141,341		$ 4,152,371
PIRM
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	4,000	1,800
Segment reporting intercompany expense	800	800
UWS
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	800	800
Segment reporting intercompany expense	1,800	1,800
Corporate
Segment Reporting Information [Line Items]
Segment reporting intercompany expense	2,200	0
Operating Segments \| PIRM
Segment Reporting Information [Line Items]
Operating Revenues	173,055	175,808
Depreciation and Amortization	25,011	26,799
Operating Income/(Loss)	18,318	14,352
Equity in (Losses)/Earnings of Affiliates, Net of Tax	706	(524)
Net Income/(Loss) From Continuing Operations	19,232	11,387
Capital Expenditures	14,076	15,613
Assets	1,873,151		1,988,915
Operating Segments \| UWS
Segment Reporting Information [Line Items]
Operating Revenues	275,621	244,518
Depreciation and Amortization	13,245	15,775
Operating Income/(Loss)	75,614	45,852
Equity in (Losses)/Earnings of Affiliates, Net of Tax	0	0
Net Income/(Loss) From Continuing Operations	76,433	45,435
Capital Expenditures	1,904	5,768
Assets	2,165,633		2,159,403
Corporate
Segment Reporting Information [Line Items]
Operating Revenues	0	0
Depreciation and Amortization	8,587	6,645
Operating Income/(Loss)	(26,861)	(39,000)
Equity in (Losses)/Earnings of Affiliates, Net of Tax	(194)	102
Net Income/(Loss) From Continuing Operations	(61,859)	(55,089)
Capital Expenditures	7,796	11,586
Assets	5,975,853		5,938,106
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(4,791)	(2,618)
Depreciation and Amortization	0	0
Operating Income/(Loss)	0	0
Equity in (Losses)/Earnings of Affiliates, Net of Tax	0	0
Net Income/(Loss) From Continuing Operations	0	0
Capital Expenditures	0	$ 0
Assets	$ (5,873,296)		$ (5,934,053)

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