Summary of Intangible Assets Acquired and Weighted Average Useful Lives of Definite-lived Intangible Assets (Details) - Initial Montana Acquisition [Member] $ in Thousands	Jan. 29, 2016 USD ($)
Acquired Finite Lived Intangible Assets [Line Items]
Intangible Assets As Recorded, at Fair Value	$ 14,400
Customer Relationships [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Lives of Definite-lived Intangible Assets	15 years
Intangible Assets As Recorded, at Fair Value	$ 9,800
Noncompete Agreements [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Lives of Definite-lived Intangible Assets	5 years
Intangible Assets As Recorded, at Fair Value	$ 3,900
Trade Names [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Lives of Definite-lived Intangible Assets	4 years
Intangible Assets As Recorded, at Fair Value	$ 500
Other [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Lives of Definite-lived Intangible Assets	15 years
Intangible Assets As Recorded, at Fair Value	$ 200