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Benefit Plans | 12 Months Ended
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Dec. 31, 2017
Retirement Benefits [Abstract] |
Benefit Plans | Benefit Plans The Company has a defined contribution plan that is a qualified employee profit-sharing plan, covering substantially all of its employees. Under this plan, the Company is able to make discretionary contributions for the benefit of its employees that are qualified plan participants, up to Internal Revenue Service limits. The Company’s consolidated Affiliates have their own qualified defined contribution retirement plans covering their respective employees or, for several Affiliates, have their employees covered under the Company’s plan. In each case, the relevant Affiliate is able to make discretionary contributions for the benefit of its employees, as applicable, that are qualified plan participants, up to Internal Revenue Service limits. Consolidated expenses related to these plans were $18.7 million, $18.9 million and $20.1 million for the years ended December 31, 2015, 2016 and 2017, respectively. The controlling interest’s portion of expenses related to these plans were $3.1 million, $3.7 million and $3.9 million for the years ended December 31, 2015, 2016 and 2017, respectively.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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