Percentage reduction of federal statutory income tax rate due to change in statutory federal rate.

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Percentages of the entity's total revenues that are within the scope of the new accounting standard update.

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Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification of certain tax effects.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Adoption of New Accounting Pronouncements [Abstract]
Federal corporate tax rate			21.00%	35.00%	35.00%
Reduction in tax rate			14.00%
Classified distributions from equity method investees as cash flows from operating activities			$ 725	$ 58
Cash flows from investing activities			(8,325)	(1,763)
Cash flows from operating activities			(5,119)	(1,085)
Revenues within scope of updated accounting guidance	$ 46,370	$ 44,798	136,353	132,289
ASU 2018-02 [Member]
Adoption of New Accounting Pronouncements [Abstract]
Reclassification of standard tax effects on AOCI and retained earnings					$ 0
ASU 2018-02 [Member] \| Retained Earnings [Member]
Adoption of New Accounting Pronouncements [Abstract]
Reclassification of standard tax effects on AOCI and retained earnings					(2,100)
ASU 2018-02 [Member] \| Accumulated Other Comprehensive Income [Member]
Adoption of New Accounting Pronouncements [Abstract]
Reclassification of standard tax effects on AOCI and retained earnings					2,100
ASU 2016-15 [Member]
Adoption of New Accounting Pronouncements [Abstract]
Classified distributions from equity method investees as cash flows from operating activities			725
Cash flows from investing activities				(58)
Cash flows from operating activities				$ 58
ASU 2016-01 [Member]
Adoption of New Accounting Pronouncements [Abstract]
Cumulative effect adjustment that increased retained earnings and decreased AOCI					0
ASU 2016-01 [Member] \| Retained Earnings [Member]
Adoption of New Accounting Pronouncements [Abstract]
Cumulative effect adjustment that increased retained earnings and decreased AOCI					9,825
ASU 2016-01 [Member] \| Accumulated Other Comprehensive Income [Member]
Adoption of New Accounting Pronouncements [Abstract]
Cumulative effect adjustment that increased retained earnings and decreased AOCI					$ (9,825)
ASU 2014-09 [Member]
Adoption of New Accounting Pronouncements [Abstract]
Revenues within scope of updated accounting guidance			$ 88
Revenues within scope of updated accounting guidance, as a percentage of total revenues (less than)			0.10%