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Fair Value Measurements - Schedule of Assets with Unobservable Inputs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Nonrecurring assets, loss	$ (148)	$ 1,942	$ 457
Loans measured for impairment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Nonrecurring assets, loss	(952)	352	270
Other real estate owned
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Nonrecurring assets, loss	0	904	187
Other operating expense - impairment on equity method investment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Nonrecurring assets, loss	804	686	$ 0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans measured for impairment	848	7,988
Other real estate owned		3,927
Other assets - equity method investment	709	2,292
Total fair value assets	1,557	14,207
Fair Value, Measurements, Nonrecurring | Level 1 inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans measured for impairment	0	0
Other real estate owned		0
Other assets - equity method investment	0	0
Total fair value assets	0	0
Fair Value, Measurements, Nonrecurring | Level 2 inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans measured for impairment	0	0
Other real estate owned		0
Other assets - equity method investment	0	0
Total fair value assets	0	0
Fair Value, Measurements, Nonrecurring | Level 3 inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans measured for impairment	848	7,988
Other real estate owned		3,927
Other assets - equity method investment	709	2,292
Total fair value assets	$ 1,557	$ 14,207

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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Fair value portion of investments accounted under the equity method.

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

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