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Stock-Based Compensation - Stock Options (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Number of Stock Options |  |  |
Balance at the beginning of the period (in shares) | 326,460 |  |
Forfeited (in shares) | (42,516) |  |
Expired (in shares) | (196,447) |  |
Balance at the end of the period (in shares) | 87,497 | 326,460 |
Exercisable at the end of the period (in shares) | 87,497 |  |
Weighted Average Exercise Price |  |  |
Balance at the beginning of the period (in dollars per share) | $ 11.79 |  |
Forfeited (in dollars per share) | 12.48 |  |
Expired (in dollars per share) | 11.88 |  |
Balance at the end of the period (in dollars per share) | 11.23 | $ 11.79 |
Exercisable at the end of the period (in dollars per share) | $ 11.23 |  |
Weighted Average Remaining Contractual Term |  |  |
Outstanding at the end of the period (in years) | 6 months 29 days |  |
Exercisable at the end of the period (in years) | 6 months 29 days |  |
Intrinsic value of outstanding options | $ 0 |  |
Options granted (in shares) | 0 | 0 | 0
Options vested (in shares) | 0 | 0 | 0
Excess tax benefits from disqualifying dispositions | $ 0 | $ 0 | $ 0
Options exercised (in shares) | 0 | 0 | 0
Proceeds from exercise of stock options | $ 0 | $ 0 | $ 0
Stock options |  |  |
Weighted Average Remaining Contractual Term |  |  |
Unrecognized compensation expense related to share-based compensation plans | $ 0 |  |

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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