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Fair Value Measurement and Fair Value of Financial Instruments (Quantitative Information for Significant Unobservable Inputs) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Non-PCI Loans | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
Non-PCI impaired loans | $ 37,174 | $ 38,188
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
Non-PCI impaired loans | 37,174 | 38,188
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
Non-PCI impaired loans | $ 28,596 | $ 22,802
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Weighted Average |  |
Quantitative information |  |
Discount | 5.00% | 6.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Minimum |  |
Quantitative information |  |
Discount | 4.00% | 4.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Fair Value, Measurements, Nonrecurring | Maximum |  |
Quantitative information |  |
Discount | 7.00% | 10.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair value of property | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
Non-PCI impaired loans | $ 3,114 | $ 9,773
Selling cost | 8.00% | 8.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair value of property | Fair Value, Measurements, Nonrecurring | Weighted Average |  |
Quantitative information |  |
Selling cost | 8.00% | 8.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
Non-PCI impaired loans | $ 4,849 | $ 3,207
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring | Weighted Average |  |
Quantitative information |  |
Discount | 39.00% | 29.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring | Minimum |  |
Quantitative information |  |
Discount | 15.00% | 20.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair value of collateral, discount | Fair Value, Measurements, Nonrecurring | Maximum |  |
Quantitative information |  |
Discount | 50.00% | 32.00%
Non-PCI Loans | Significant Unobservable Inputs (Level 3) | Fair value of collateral, contract value | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
Non-PCI impaired loans | $ 615 | $ 2,406
OREO | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
OREO |  | 9
OREO | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
OREO |  | 9
OREO | Significant Unobservable Inputs (Level 3) | Fair value of property | Fair Value, Measurements, Nonrecurring |  |
Quantitative information |  |
OREO |  | $ 9
Selling cost |  | 8.00%
OREO | Significant Unobservable Inputs (Level 3) | Fair value of property | Fair Value, Measurements, Nonrecurring | Weighted Average |  |
Quantitative information |  |
Selling cost |  | 8.00%
Equity warrants | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |
Quantitative information |  |
Equity warrants | $ 931 | $ 679
Equity warrants | Significant Unobservable Inputs (Level 3) | Black-Scholes option pricing model | Fair Value, Measurements, Recurring | Weighted Average |  |
Quantitative information |  |
Volatility | 48.00% |
Liquidity discount | 47.00% |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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