Business Acquisition (Details 1) - USD ($) $ in Thousands				12 Months Ended
		May. 18, 2015	Oct. 07, 2014	Dec. 31, 2015
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount			$ 9,250
Minimum
Intangible assets acquisition
Intangible assets estimated useful life				3 years
Maximum
Intangible assets acquisition
Intangible assets estimated useful life				10 years
Supplier relationships
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount			4,620
Customer relationships
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount			3,450
Trade name
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount			860
Non-compete agreement
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount			$ 320
Kay Flow Industries, Inc.
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount		$ 53,091
Weighted average useful life	[1]	10 years
Kay Flow Industries, Inc. | Unpatented Technology
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount		$ 13,400
Weighted average useful life		10 years
Kay Flow Industries, Inc. | Customer relationships
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount		$ 22,800
Weighted average useful life		10 years
Kay Flow Industries, Inc. | Trade name
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount		$ 15,500
Kay Flow Industries, Inc. | Trade name | Minimum
Intangible assets acquisition
Weighted average useful life		7 years
Kay Flow Industries, Inc. | Trade name | Maximum
Intangible assets acquisition
Weighted average useful life		10 years
Kay Flow Industries, Inc. | Non-compete agreement
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount		$ 1,342
Weighted average useful life		5 years
Kay Flow Industries, Inc. | Favorable leasehold interest
Intangible assets acquisition
Acquired Finite-lived Intangible Asset, Amount		$ 49
Weighted average useful life		5 years
Auburn Bean and Grain
Intangible assets acquisition
Intangible assets estimated useful life	[2]		10 years
Auburn Bean and Grain | Supplier relationships
Intangible assets acquisition
Intangible assets estimated useful life			10 years
Auburn Bean and Grain | Customer relationships
Intangible assets acquisition
Intangible assets estimated useful life			10 years
Auburn Bean and Grain | Trade name
Intangible assets acquisition
Intangible assets estimated useful life			10 years
Auburn Bean and Grain | Non-compete agreement | Minimum
Intangible assets acquisition
Intangible assets estimated useful life			1 year
Auburn Bean and Grain | Non-compete agreement | Maximum
Intangible assets acquisition
Intangible assets estimated useful life			5 years

[1] weighted average number of years

[2] weighted average number of years