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Retirement Benefit Plan | 12 Months Ended
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Dec. 31, 2018
Retirement Benefits [Abstract] |
Retirement Benefit Plan | 22. Retirement Benefit Plan Our 401(k) retirement plan provides for optional employee contributions up to the applicable Internal Revenue Service annual limit and discretionary employer matching contributions. Through June 30, 2017 we made discretionary matching contributions to each participant’s account at a rate of (i) 100% of each participant’s first 1% of contributions plus (ii) 50% of each participant’s contributions up to the next 5% of eligible compensation. Beginning July 1, 2017, we make discretionary matching contributions to each participant’s account at a rate of 100% of each participant’s contributions up to 5% of eligible compensation. We recorded matching contributions of $6.5 million, $4.8 million and $3.8 million during the years ended December 31, 2018, 2017 and 2016, respectively.

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -URI http://asc.fasb.org/topic&trid=2127225 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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