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Long-Term Indebtedness (Details) - USD ($) |  |  |  | 3 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 27, 2016 | Mar. 20, 2015 | Feb. 24, 2014 | Mar. 31, 2018 | Feb. 28, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017 | Mar. 30, 2017 | Mar. 03, 2015
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Long-term indebtedness |  |  |  | $ 226,242,000 |  |  | $ 49,924,000 | $ 49,905,000 |  |
Maximum |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Equity interest percentage | 65.00% |  |  |  |  |  |  |  |  |
Line of Credit |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Debt outstanding at period end |  |  |  | $ 177,000,000.0 |  |  | $ 0 | 0 |  |
Debt weighted average interest rate |  |  |  | 3.00% |  |  |  |  |  |
Remaining availability under the facilities |  |  |  | $ 245,600,000 |  |  |  |  |  |
Maximum leverage ratio |  |  |  | 2.5 |  |  |  |  |  |
Amended Credit Agreement |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Maximum borrowings under line of credit |  |  |  |  | $ 325,000,000 | $ 200,000,000 |  |  |  |
JPMorgan Chase Bank And Wells Fargo Bank | Line of Credit |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Maximum borrowings under line of credit |  |  |  |  |  |  |  |  | $ 100,000,000 | $ 100,000,000
Letters of credit outstanding amount |  |  |  | $ 2,400,000 |  |  |  | $ 2,500,000 |  |
Remaining availability under the facilities |  |  |  | $ 145,600,000 |  |  |  |  |  |
Prudential Investment Management Inc | Line of Credit |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Remaining availability under the facilities |  |  | $ 150,000,000.0 |  |  |  |  |  |  |
Long-term indebtedness |  | $ 50,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Term |  | 5 years |  |  |  |  |  |  |  |
Interest rate during period |  |  |  | 3.35% |  |  |  |  |  |
Period after request is issued, by company, for interest payable rate to be determined by Prudential |  |  | 5 days |  |  |  |  |  |  |
JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Maximum borrowings under line of credit | $ 200,000,000.0 |  |  |  |  |  |  |  |  |
Maximum draw capacity in approved foreign currencies | $ 50,000,000.0 |  |  |  |  |  |  |  |  |
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.00% |  |  |  |  |  |  |  |  |
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Debt instrument, additional margin interest rate | 0.00% |  |  |  |  |  |  |  |  |
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Debt instrument, additional margin interest rate | 0.625% |  |  |  |  |  |  |  |  |
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | Federal Funds Effective Rate |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.50% |  |  |  |  |  |  |  |  |
Option Two | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.625% |  |  |  |  |  |  |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References 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 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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