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CORPORATE BORROWINGS - Narrative (Details) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2018 | Feb. 14, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |
Credit agreement - revolver |  | $ 0 |  |  | $ 1,000
Unamortized loan fees |  | 129,000 |  |  | 448,000
Long-term debt, gross |  | 40,000,000 |  |  | 41,508,000
Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
New loan fees on credit agreement |  | 1,148,000 |  |  |
Unamortized loan fees |  | 1,195,000 |  |  |
Note Purchase Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unamortized loan fees |  | 129,000 |  |  |
Credit Agreement Due 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Credit agreement - revolver |  |  |  | $ 300,000,000 |
Secured Debt | Note Purchase Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
New loan fees on credit agreement |  | 0 |  |  |
Term loan face amount |  | 20,000,000 |  |  |
Secured Debt | Note Purchase Agreement Due 2027 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross |  | $ 20,000,000 |  |  | 20,000,000
Proceeds from issuance of debt |  |  | $ 20,000,000 |  |
Senior secured notes, stated interest rate |  | 3.53% |  |  |
Secured Debt | Note Purchase Agreement Due 2029 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross |  | $ 20,000,000 |  |  | 20,000,000
Proceeds from issuance of debt | $ 20,000,000 |  |  |  |
Senior secured notes, stated interest rate |  | 3.80% |  |  |
Revolver | Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Remaining borrowing capacity |  | $ 300,000,000 |  |  |
Credit Agreement, interest rate |  | 1.20% |  |  |
Revolver | Credit Agreement | Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Contingent increase in borrowing capacity |  |  |  | $ 100,000,000 |
Revolver | Credit Agreement | Revolving Credit Agreement, Due 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 300,000
Credit Agreement, interest rate |  |  |  |  | 3.19%
Maximum borrowing capacity |  |  |  |  | $ 150,000
Revolver | Credit Agreement | Revolving Credit Agreement, Due 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, gross |  | $ 0 |  |  | $ 0
Credit Agreement, interest rate |  | 1.15% |  |  |
Revolver | Secured Debt | Note Purchase Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Term loan face amount |  | $ 105,000,000 |  |  |

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- Definition Line Of Credit Facility, Contingent Increase In Borrowing Capacity + References No definition available. + Details
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- Definition 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. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120520924&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(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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=120391452&loc=d3e13212-122682 Reference 4: 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=120398452&loc=d3e534808-122878 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References 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=119993939&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 + Details
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- 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=120391452&loc=d3e13212-122682 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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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://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=120391452&loc=d3e13212-122682 Reference 2: 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=120398452&loc=d3e534808-122878 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(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition The effective interest rate at the end of the reporting period. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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