Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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-Name Accounting Standards Codification
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-Section S99
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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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Long-Term Debt (Long-Term Debt with Related Unamortized Debt Issuance Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 18, 2015	Mar. 09, 2015
Debt Instrument [Line Items]
Principal	$ 310,578
Unamortized Debt Issuance Costs	5,065	$ 5,527
Subordinated Notes [Member] \| Subordinated Notes Payable, Maturing June 2045 [Member]
Debt Instrument [Line Items]
Principal	150,000	150,000		$ 150,000
Unamortized Debt Issuance Costs	$ 4,780
Notes payable maturity date	Jun. 15, 2045
Term Note [Member] \| Term Note Payable, Maturing December 2018 [Member]
Debt Instrument [Line Items]
Principal	$ 89,200	107,100	$ 125,000
Unamortized Debt Issuance Costs	$ 285
Notes payable maturity date	Dec. 18, 2018
Other Long-Term Debt [Member]
Debt Instrument [Line Items]
Principal	$ 71,378	$ 89,196