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COMMITMENTS AND CONTINGENCIES - Bank Line of Credit and Leases (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Leases |  |  |  |  |
Rent expense incurred relating to operating leases | $ 3,680 | $ 5,707 | $ 7,436 | $ 9,459 |
Reduction to occupancy expenses |  | 279 |  | 524 |
Sublease loss reserve | 0 | $ 2,359 | 150 | $ 2,359 |
Future minimum rental payments |  |  |  |  |
Remainder of 2017 | 9,389 |  | 9,389 |  |
2018 | 18,416 |  | 18,416 |  |
2019 | 18,366 |  | 18,366 |  |
2020 | 11,610 |  | 11,610 |  |
2021 | 6,130 |  | 6,130 |  |
Thereafter | 16,085 |  | 16,085 |  |
Total | 79,996 |  | 79,996 |  |
Sublease Income |  |  |  |  |
2018 | (399) |  | (399) |  |
2019 | (544) |  | (544) |  |
2020 | (871) |  | (871) |  |
2021 | (871) |  | (871) |  |
Thereafter | (3,048) |  | (3,048) |  |
Total | (5,733) |  | (5,733) |  |
Net Minimum Payments |  |  |  |  |
Remainder of 2017 | 9,389 |  | 9,389 |  |
2018 | 18,017 |  | 18,017 |  |
2019 | 17,822 |  | 17,822 |  |
2020 | 10,739 |  | 10,739 |  |
2021 | 5,259 |  | 5,259 |  |
Thereafter | 13,037 |  | 13,037 |  |
Total | 74,263 |  | 74,263 |  |
Unsecured revolving credit facility |  |  |  |  |
Net Minimum Payments |  |  |  |  |
Commitment amount | $ 40,000 |  | $ 40,000 |  |
Fixed rate of interest (as a percent) | 3.50% |  | 3.50% |  |
Borrowings under the credit facility | $ 0 |  | $ 0 |  | $ 0
Available credit under the facility | 33,001 |  | $ 33,001 |  |
Unsecured revolving credit facility | LIBOR |  |  |  |  |
Net Minimum Payments |  |  |  |  |
Reference rate (as a percent) |  |  | LIBOR |  |
Interest rate margin (as a percent) |  |  | 1.00% |  |
Unsecured revolving credit facility | Prime |  |  |  |  |
Net Minimum Payments |  |  |  |  |
Reference rate (as a percent) |  |  | Prime |  |
Interest rate margin (as a percent) |  |  | (1.50%) |  |
Standby letters of credit |  |  |  |  |
Net Minimum Payments |  |  |  |  |
Letters of credit outstanding | $ 6,999 |  | $ 6,999 |  |
Fee on the outstanding balances (as a percent) |  |  | 1.00% |  |

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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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