New Market Tax Credit (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended			3 Months Ended
	Apr. 27, 2017	Dec. 31, 2016	Jul. 31, 2013	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restricted cash				$ 5,600
Current restricted cash		$ 3,000		3,000
Long-term restricted cash		3,881		2,612
Release of restricted cash				$ 1,269
Subsequent Event [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Release of restricted cash	$ 4,800
Chase and US Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contribution to affiliate			$ 5,600
Twain Investment Fund 192 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net proceeds from contribution		1,900
Contribution liability compliance period				7 years
Contribution liability				$ 3,100
Contribution liability, current				500
Contribution liability, noncurrent				$ 2,600
Twain Investment Fund 192 [Member] | U.S. Bank Community [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contribution to affiliate		3,100
Twain Investment Fund 192 [Member] | Tile Shop Holdings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Syndicate costs		1,200
Twain Investment Fund 192 [Member] | Tile Shop Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan amount		$ 6,700
Loan interest rate		1.37%
Tile Shop Investment Fund [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contribution to affiliate			4,400
Contribution liability compliance period				7 years
Contribution liability				$ 2,200
Contribution liability, current				700
Contribution liability, noncurrent				$ 1,500
Tile Shop Investment Fund [Member] | Tile Shop Holdings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Syndicate costs			1,200
Tile Shop Investment Fund [Member] | Tile Shop Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan amount			13,500
U.S. Bank Community [Member] | Oklahoma [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing agreement project cost		$ 9,200
Chase and US Bank [Member] | Oklahoma [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing agreement project cost			$ 19,100