Stockholders' Equity - Common and Preferred Stock (Details)				6 Months Ended	9 Months Ended
	Mar. 02, 2016 USD ($)	Feb. 17, 2016 USD ($) shares	Jan. 04, 2016 USD ($) shares	Oct. 03, 2016 USD ($)	Sep. 30, 2016 USD ($) vote_per_stock $ / shares shares	Sep. 30, 2015 USD ($)	Dec. 31, 2015 $ / shares shares	Feb. 09, 2015 USD ($) shares	Feb. 06, 2015 shares	Dec. 31, 2014 USD ($)	Feb. 16, 2011 shares
Class of Stock [Line Items]
Common Stock, Shares Authorized | shares					150,000,000		150,000,000				150,000,000
Proceeds from rights offering, net of expenses		$ 286,000,000.0			$ 286,003,000	$ 49,528,000
Common stock dividends (in shares) | shares								5,102
Series B
Class of Stock [Line Items]
Voting rights per stock (vote per stock) | vote_per_stock					0.054
Shares convertible for each stock (in shares) | shares					0.054
Preferred stock, per share liquidation value (usd per share) | $ / shares					$ 29		$ 29
Dividends declared per share (usd per share) | $ / shares					$ 2.90
Preferred stock, shares outstanding (in shares) | shares					44,258		44,258
Dividends, Preferred Stock, Cash	$ 167,000				$ 167,000
Dividends, Preferred Stock, Multiplier					1.3
Common stock dividends, declared and undeclared								$ 159,000
Common stock dividends, undeclared										$ 159,000
Common Stock
Class of Stock [Line Items]
Price per share on issuable shares (usd per share) | $ / shares					$ 3.77
Number of trading dates used to calculated price per share					20 days
Transferable Subscription Rights
Class of Stock [Line Items]
Common Stock, Shares Authorized | shares			20,138,888
Proceeds from Issuance of Private Placement		$ 290,000,000
Value of subscription rights to be exercised within 10 days of commencement			$ 30,000,000
Value of subscription rights to be exercised, maximum			290,000,000
Sale of stock, commitment fee			$ 1,500,000
Sale of stock, commitment fee, percent			0.50%
Sale of stock, expenses reimbursed (not exceeding)			$ 50,000
Common Stock | Transferable Subscription Rights
Class of Stock [Line Items]
Shares, Issued | shares		20,138,888
Common Stock | Basic Subscription Rights [Member] | Transferable Subscription Rights
Class of Stock [Line Items]
Shares, Issued | shares		176,086
Common Stock | Over Subscription Rights [Member] | Transferable Subscription Rights
Class of Stock [Line Items]
Shares, Issued | shares		13,136,817
Kien Huat Realty Limited [Member] | Common Stock | Standby Purchase Agreement [Member]
Class of Stock [Line Items]
Shares, Issued | shares		6,825,985							533,433
Kien Huat Realty Limited [Member]
Class of Stock [Line Items]
Noncontrolling interest, ownership percentage by parent					88.40%
Subsequent Event [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash				$ 32,087