Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Long-term Debt - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 13, 2017	Dec. 05, 2016	May 26, 2016	Apr. 29, 2016	Sep. 22, 2006
Debt Instrument [Line Items]
Notes Payable, Noncurrent	$ 160,118	$ 161,364
Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Debt Instrument, Face Amount				$ 30,000
Interboro, LLC Promissory Note
Debt Instrument [Line Items]
Debt Instrument, Face Amount						$ 8,550
BB&T Term Note Payable
Debt Instrument [Line Items]
Notes Payable, Noncurrent					$ 5,200
Debt Instrument, Interest Rate, Stated Percentage					1.65%
SBA Note Payable
Debt Instrument [Line Items]
Notes Payable, Noncurrent							$ 20,000
150M Senior Notes
Debt Instrument [Line Items]
Notes Payable, Noncurrent			$ 150,000
Debt Instrument, Interest Rate, Stated Percentage			6.25%