Lease Commitments for Leases having Terms of More than One Year (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Year-ended December 31:
2014	$ 72,614
2015	43,114
2016	18,525
2017	13,079
2018	10,791
Thereafter	7,723
Total	165,846
Property, Plant and Equipment
Year-ended December 31:
2014	7,641
2015	2,039
2016	1,909
2017	1,782
2018	811
Thereafter	4,601
Total	18,783
Rental Equipment
Year-ended December 31:
2014	64,973
2015	41,075
2016	16,616
2017	11,297
2018	9,980
Thereafter	3,122
Total	$ 147,063

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

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