Available-for-Sale Securities - Summary of Maturities of Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	$ 29,896	$ 52,942
Available-for-Sale Securities, Fair Value	29,668	52,690
U.S. Government and Federal Agencies
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale Securities After three months through one year, Amortized Cost		2,000
Available-for-Sale Securities After one year through five years, Amortized Cost	24,909	39,906
Available-for-Sale Securities, Amortized Cost	24,909	41,906
Available-for-Sale Securities After three months through one year, Fair Value		1,998
Available-for-Sale Securities After one year through five years, Fair Value	24,658	39,561
Available-for-Sale Securities, Fair Value	24,658	41,559
Certificates of Deposit
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale Securities After three months through one year, Amortized Cost		500
Available-for-Sale Securities After three months through one year, Fair Value		500
Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	4,987	10,536
Available-for-Sale Securities, Fair Value	$ 5,010	$ 10,631

Available-for-sale securities, debt maturities, after three month through one years amortized cost.

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- Definition

Available-for-sale Securities, debt maturities, after three month through one years fair value.

+ References

No definition available.

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- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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- Definition

Amount after adjustments of available-for-sale debt securities at cost, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Publisher FASB
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- Definition

Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of debt securities categorized neither as held-to-maturity nor trading.

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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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