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Long-Term Debt - Outstanding Long-Term Debt (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Instrument [Line Items] |  |
Long-term Debt | $ 327,200 | $ 205,200
Capital lease obligation | 1,310 | 2,070
Less: debt issuance costs | (567) | (433)
Long-term Debt and Capital Lease Obligations | 327,955 | 206,816
Less: current maturities | (11,935) | (9,421)
Total long-term debt, net of current maturities | 316,020 | 197,395
9.08% bond, due June 1, 2022 |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 7,986 | 7,982
Debt Instrument, Interest Rate, Stated Percentage | 9.08% |
6.64% note, due October 31, 2017 |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.64% |
5.50% note, due October 12, 2020 |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 4,000 | 6,000
Debt Instrument, Interest Rate, Stated Percentage | 5.50% |
5.93% note, due October 31, 2023 |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 15,000 | 18,000
Debt Instrument, Interest Rate, Stated Percentage | 5.93% |
5.68% note, due June 30, 2026 |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 23,200 | 26,100
Debt Instrument, Interest Rate, Stated Percentage | 5.68% |
6.43% note, due May 2, 2028 |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 7,000 | 7,000
Debt Instrument, Interest Rate, Stated Percentage | 6.43% |
3.73% note, due December 16, 2028 |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 20,000 | 20,000
Debt Instrument, Interest Rate, Stated Percentage | 3.73% |
3.88% note, due May 15, 2029 |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 50,000 | 50,000
Debt Instrument, Interest Rate, Stated Percentage | 3.88% |
Uncollateralized Senior Note Due April Two Thousand Thirty Two [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 70,000 | 70,000
Uncollateralized Senior Note Due May Two Thousand Thirty Eight [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 50,000 |
Debt Instrument, Interest Rate, Stated Percentage | 3.48% |
Uncollateralized Senior Note Due November Two Thousand Thirty Eight [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 50,000 |
Debt Instrument, Interest Rate, Stated Percentage | 3.58% |
Term Note Due January Two Thousand Twenty [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 30,000 |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 0.75% |
Debt Instrument, Interest Rate, Stated Percentage | 3.23% |
Promissory note |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 26 | $ 97

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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