Lease Obligations	12 Months Ended
Lease Obligations	Dec. 31, 2014
Leases [Abstract]
Lease Obligations	Lease Obligations The Company and its subsidiaries use office space and equipment under leases expiring at various dates. These leases are considered operating leases for financial reporting purposes. Some of these leases have options to extend the length of the leases and contain clauses for cost of living, operating expense and real estate tax adjustments. Future minimum lease payments, without provision for sublease income, are: $41,210,000 in 2015; $36,547,000 in 2016; $32,336,000 in 2017; $27,012,000 in 2018; $23,344,000 in 2019 and $78,517,000 thereafter. Rental expense was $45,198,000, $44,752,000 and $38,179,000 for 2014, 2013 and 2012, respectively.

The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing.

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