Acquisitions Acquisitions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended									10 Months Ended	12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Oct. 16, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Oct. 17, 2014
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired												$ 0	$ 10,000	$ 382,880
Net sales		$ 185,530	$ 202,290	$ 203,320	$ 202,880	$ 192,760	$ 222,190	$ 224,900	$ 224,130			$ 794,020	863,980	$ 887,300
Business Acquisition, Lion Holdings [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired										$ 27,500
Net sales															$ 10,000
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired													$ 10,000
Allfast Fasteners [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired											$ 351,220
Business Acquisition, Percentage of Voting Interests Acquired																100.00%
Business Acquisition, Deferred Purchase Price	[1]										$ 15,730

[1] Of the deferred purchase price, approximately $8.7 million, represented the Company's best estimate of the underlying obligations for certain tax amounts the Company agreed to reimburse the previous owner in order to acquire additional tax attributes. During 2015, the Company paid $5.2 million of such amount and the remaining $3.5 million liability was removed, with a corresponding reduction to goodwill, due to the finalization of the Seller's tax liability. In addition, deferred purchase price included approximately $7.0 million of other liabilities, which the Company agreed to pay on behalf of the previous owner, all of which was paid out as of December 31, 2016.