Acquisitions Acquisitions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended								10 Months Ended	12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Oct. 16, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Oct. 17, 2014
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired											$ 10,000	$ 382,880		$ 84,790
Net sales		$ 192,760	$ 222,190	$ 224,900	$ 224,130	$ 223,430	$ 222,330	$ 224,710	$ 216,830		863,980	$ 887,300		799,700
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			$ 84,790
Business Acquisition, Percentage of Voting Interests Acquired														100.00%
Business Acquisition, Deferred Purchase Price														$ 2,600
Business Acquisition, Deferred Purchase Price and Contingent Consideration	[1]													$ 4,280
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	[2]									$ 15,730
Business Acquisition, Martinic [Member]
Business Acquisition [Line Items]
Net sales																$ 13,000
Business Acquisition, Wulfrun [Member]
Business Acquisition [Line Items]
Net sales																$ 10,000
Business Acquisition, Mac Fasteners [Member]
Business Acquisition [Line Items]
Net sales															$ 17,000

[1] Deferred/contingent consideration included approximately $2.6 million of both short-term and long-term deferred purchase price, based on set amounts and fixed payment schedules per the purchase agreement, and an additional $1.7 million of contingent consideration to be paid, if earned, based on a multiple of future earnings, as defined.

[2] Of the deferred purchase price, approximately $8.7 million, represents the Company's best estimate of the underlying obligations for certain tax amounts the Company has 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 includes approximately $7.0 million of other liabilities which the Company has agreed to pay on behalf of the previous owner, of which approximately $4.9 million was paid through December 31, 2015.