Fair Value Disclosure of Financial Instruments (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Embedded Derivative, Fair Value of Embedded Derivative Asset	$ 10,800
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Derivative financial instruments, Asset	2,364	$ 6
Embedded Derivative, Fair Value of Embedded Derivative Asset	10,783
Derivative financial instruments, Liability	7,562	10,358
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) \| Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Derivative financial instruments, Asset	0	0
Embedded Derivative, Fair Value of Embedded Derivative Asset	0
Derivative financial instruments, Liability	0	0
Significant Other Observable Inputs (Level 2) \| Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Derivative financial instruments, Asset	2,364	6
Embedded Derivative, Fair Value of Embedded Derivative Asset	10,783
Derivative financial instruments, Liability	7,562	10,358
Significant Unobservable Inputs (Level 3) \| Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Derivative financial instruments, Asset	0	0
Embedded Derivative, Fair Value of Embedded Derivative Asset	0
Derivative financial instruments, Liability	$ 0	$ 0

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as an asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

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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

Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

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