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Employee Benefit Plans - Employee Stock Ownership Plan (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 29, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 23, 2005
Compensation Related Costs, Retirement and Share Based Payment [Line Items] |  |  |  |  |
ESOP compensation expense |  | $ 1,100,000 |  | $ 1,100,000 |
Loan receivable from ESOP |  |  |  |  | $ 19,600,000
ESOP issued price (usd per share) |  |  | $ 10 |  |
ESOP cash contributions |  |  | $ 0 | 1,100,000 |
ESOP, dividends and interest received |  |  |  | $ 50,000 |
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract] |  |  |  |  |
Allocated to participants (shares) |  |  | 885,896 | 1,203,810 |
Distributed to participants |  |  | (885,896) | (317,914) |
Total ESOP shares (shares) | 78,362 |  | 0 | 885,896 |
Common Stock [Member] |  |  |  |  |
Compensation Related Costs, Retirement and Share Based Payment [Line Items] |  |  |  |  |
Repayments of Debt, Equity Instrument Consideration, Shares Issued | 753,490 |  |  |  |
ESOP shares purchased (shares) |  |  | 1,957,300 |  |
Share Acquisition Loan [Member] |  |  |  |  |
Compensation Related Costs, Retirement and Share Based Payment [Line Items] |  |  |  |  |
Loans Payable |  |  | $ 0 | $ 0 |

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- Definition Employee Stock Ownership Plan (ESOP), Debt Structure, Employer Loan, Amount + References No definition available. + Details
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- Definition Employee Stock Ownership Plan (ESOP), Interest And Dividend Payments from ESOP + References No definition available. + Details
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- Definition Employee Stock Ownership Plan (ESOP), Number Of Distributed Shares + References No definition available. + Details
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- Definition Employee Stock Ownership Plan (ESOP), Subscription Price + References No definition available. + Details
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- Definition Repayments of Debt, Equity Instrument Consideration, Shares Issued + References No definition available. + Details
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- Definition This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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- Definition The amount of plan compensation cost recognized during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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- Definition 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. + References No definition available. + Details
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- Definition The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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- Definition This item represents the number of shares provided to the Employee Stock Ownership Plan (ESOP) during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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- Definition Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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- References No definition available. + Details
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- Definition Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)(a)(2)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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