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Acquisitions and Sale of Non-Controlling Interests (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) Partnership | Dec. 31, 2017 USD ($) Partnership | Dec. 31, 2016 USD ($) Installment Partnership
Business Combination, Description [Abstract] |  |  |
Number of partnership in which interest acquired | Partnership | 3 | 2 | 6
Number of partnership in which interest sold | Partnership |  |  | 1
Purchase price for additional non controlling interest |  | $ 13,000 | $ 900,000
Seller notes |  |  | $ 400,000
Number of installments | Installment |  |  | 2
Book value of purchase price |  | $ 138,000 | $ 112,000
Remaining purchase price |  |  | 1,200,000
Future tax benefits |  |  | $ 500,000
Sale of non-controlling interest percentage in partnership one |  | 2.00% | 4.00%
Sale of additional non-controlling interest percentage in partnership two |  |  | 35.00%
Cash proceeds from sale of non-controlling interest |  |  | $ 138,000
Amount of notes receivable from sale of non-controlling interest |  |  | 148,000
Total sale price |  |  | 286,000
Tax effect on sale price | $ 224,000 | $ 56,000 | 110,000
Percentage of interest acquired |  | 35.00% |
February 2017 [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  | 194,000
February 2018 [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Acquisition cost payable in two principal installments including accrued interest |  |  | $ 194,000
Minimum [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Percentage of interest acquired | 5.50% |  | 2.00%
Maximum [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Percentage of interest acquired | 35.00% |  | 35.00%

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591554-111686 + Details
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- Definition Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Refers to business acquisition cost of acquired entity charge from additional paid up capital. + References No definition available. + Details
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- Definition Amount of business acquisition principal installments payable at cost of acquired by entity at accrued interest. + References No definition available. + Details
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- Definition This element represents the business acquisition purchase price allocation net book value. + References No definition available. + Details
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- Definition Business acquisition purchase price allocation notes payable number of equal installment. + References No definition available. + Details
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- Definition The amount of business acquisition cost of acquired entity debt issued on the date of acquisition. + References No definition available. + Details
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- Definition Refers to noncontrolling interest sold in a noncash (or part noncash) transaction. "Part noncash" refers to that portion notes receivable. + References No definition available. + Details
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- Definition Refers to number of partnership interest sold by parent. + References No definition available. + Details
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- Definition Number of partnership in which interest acquired during the period. + References No definition available. + Details
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- Definition Refers to amount of non-controlling interest sold by an entity during the period, the sales prices included aggregate cash plus notes receivable of which payments due monthly based on percentages of distributions and bonuses earned by the purchasers. + References No definition available. + Details
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- Definition Refers to noncontrolling percentage sold by an entity during the period. + References No definition available. + Details
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- Definition Refers to noncontrolling interest sold by an entity during the period. + References No definition available. + Details
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- Definition Refers to amount of tax effected on noncontrolling interest sale price during the period. + References No definition available. + Details
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