Pledged Assets and Debt - Five year maturity for all debt arrangements (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Principal
2019	$ 884
2020	70,060
2021	894
2023	318,940
Total	390,778
Senior PIK notes payable
Principal
2023	276,940
Total	276,940
Secured notes payable
Principal
2023	42,000
Total	42,000
Subsidiary notes payable
Principal
2019	884
2020	70,060
2021	894
Total	$ 71,838

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
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