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Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - REO $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
REO	$ 1,841	$ 1,841
Gain (loss) on assets measured at fair value on a non-recurring basis	(4)	(127)
Level 1
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
REO	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
REO	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
REO	$ 1,841	$ 1,841

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- Definition

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]

+ References

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612

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- Definition

Fair value portion of other assets.

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