Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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- Definition

Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

+ References

No definition available.

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- Definition

The amount of expense recognized in the current period that reflects the allocation of capitalized costs associated with acquisition of leases.

+ References

No definition available.

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Organization and Summary of Significant Accounting Policies (Investments and Lease Costs) (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 18, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 16, 2013
Initial Direct Costs associated with Leases
Amortization of initial direct costs associated with leases		$ 1.6	$ 1.5	$ 1.5
WOLF
Investments
Previously held interest (as a percent)					50.00%
Acquisition of remaining outstanding shares of previously held equity method investment (as a percent)	50.00%
Controlling interest assumed (as a percent)	100.00%
WMES
Investments
Ownership interest (as a percent)		50.00%
WOLF
Investments
Previously held interest (as a percent)					50.00%