Schedule I - Condensed Financial Information of the Registrant (Parent Company Only) Parenthetical (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Other assets	$ 24,569	$ 19,990
Accounts payable and accrued expenses	$ 35,040	$ 34,458
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	23,125,000	23,116,000
Common stock, shares outstanding (in shares)	23,070,000	23,038,000
Treasury stock, common shares held (in shares)	55,000	78,000
Intercompany interest expense			$ 228
Parent Company
Condensed Financial Statements, Captions [Line Items]
Other assets	$ 17,729	$ 20,648
Accounts payable and accrued expenses	$ 115,529	$ 104,077
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	23,125,000	23,116,000
Common stock, shares outstanding (in shares)	23,070,000	23,038,000
Consolidation, Eliminations [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Other assets	$ 16,518	$ 19,974
Accounts payable and accrued expenses	104,361	102,697
Intercompany interest and dividends	0	142	75,589
Intercompany interest expense	$ 2,569	$ 2,468	$ 7,389