Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
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Fixed interest rate related to the interest rate derivative.

+ References

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Stated rate on an interest rate forward or futures contract.

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The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
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Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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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.

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-SubTopic 30
-Section 50
-Paragraph 1
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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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The cash outflow for derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3505-108585

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The cash inflow provided by derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

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Number of Interest Rate Derivatives Terminated

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in realized deferred hedging gain (loss).

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Derivatives And Hedging (Narrative) (Details)	1 Months Ended		12 Months Ended
Derivatives And Hedging (Narrative) (Details)	Aug. 31, 2016 USD ($)	May 31, 2015 USD ($) derivative_contract	Dec. 31, 2016 USD ($) derivative_contract	Dec. 31, 2015 USD ($) derivative_contract	Dec. 31, 2014 USD ($)	Jun. 24, 2016 USD ($) derivative_contract
Derivatives, Fair Value [Line Items]
Gain on cash flow hedge		$ 5,000,000	$ (2,084,000)	$ 5,007,000	$ 0
Accumulated other comprehensive loss			(9,161,000)	(7,644,000)
Gain (Loss) On Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive loss			$ 6,400,000	$ 8,200,000
Interest Rate Contracts [Member] \| Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts \| derivative_contract			3	3
Notional amount of interest rate fair value hedge derivatives			$ 200,000,000	$ 200,000,000
Derivative, fixed interest rate			1.50%	1.50%
Cash flow hedge gain (loss) to be amortized within 12 months			$ (200,000)
Interest Rate Contracts [Member] \| Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts \| derivative_contract				2
Notional amount of interest rate fair value hedge derivatives				$ 63,700,000		$ 62,900,000
Derivative, fixed interest rate				7.50%
Number of interest rate derivatives terminated \| derivative_contract						2
Proceeds from extinguishment of derivative instrument			2,200,000
Forward Starting Interest Contract [Member] \| Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts \| derivative_contract		2
Notional amount of interest rate fair value hedge derivatives		$ 215,000,000	$ 200,000,000
Payments for derivative instrument	$ 2,100,000
Derivative instruments, loss recognized in other comprehensive income (loss), effective portion	$ 2,000,000
Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, swap rate period (In years)		10 years	10 years
Derivative, forward interest rate		2.00%	1.50%
Minimum [Member] \| Interest Rate Contracts [Member] \| Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, variable rate				4.41%
Maximum [Member] \| Interest Rate Contracts [Member] \| Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, variable rate				4.44%