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Derivatives - Narrative (Details) - USD ($) | Sep. 30, 2016 | Aug. 05, 2016 | Dec. 31, 2015 | Dec. 19, 2012
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Derivative [Line Items] |  |  |  |
Interest Rate Cash Flow Hedge Liability at Fair Value | $ (982,000) |  |  |
Interest rate swap |  |  | $ 2,000 |
Cumulative changes in net gain (loss) from cash flow hedges, tax expense (benefit) | $ (382,000) |  | $ 1,000 |
Interest Rate Swap 1 | Interest rate swap |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of derivative |  |  |  | $ 150,000,000
Derivative, Fixed Interest Rate |  |  |  | 0.98%
Interest Rate Swap 2 | Interest rate swap |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of derivative |  | $ 42,500,000.0 |  |
Derivative, Fixed Interest Rate |  | 1.12% |  |
Maximum | Interest Rate Swap 2 | Interest rate swap |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of derivative |  | $ 175,000,000 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References 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 + Details
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- Definition Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax + References No definition available. + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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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. + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments. + References 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)(1) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments. + References 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)(1) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
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