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Benefit Plans | 12 Months Ended
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Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract] |
Benefit Plans | (17) Benefit Plans We sponsor a defined contribution plan for the benefit of our employees. The expense associated with this plan was approximately $8.4 million, $7.7 million, and $7.4 million in 2018, 2017, and 2016, respectively.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: 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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