Capital Stock - Issuances of Common Stock (Details) (USD $)	1 Months Ended					6 Months Ended		7 Months Ended
	Jul. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Jan. 31, 2014	Feb. 28, 2013	Jun. 30, 2014	Jun. 30, 2013	Jul. 31, 2014
Share Price	$ 13.07	$ 13.14	$ 12.55	$ 12.5	$ 15	$ 13.14		$ 13.07
Stock Issued During Period Shares New Issues	115,921	537,499	3,680,000	2,070,000	2,360,000		2,360,000	6,403,420
Stock Issued During Period, Value, New Issues	$ 1,483,000	$ 6,914,000	$ 43,989,000	$ 24,174,000	$ 35,400,000	$ 75,077,474	$ 35,400,000	$ 76,560,000
Initial Public Offering [Member]
Share Price					$ 15
Stock Issued During Period Shares New Issues					2,360,000		2,360,000
Stock Issued During Period, Value, New Issues					35,400,000		35,400,000
Follow On Offering [Member]
Share Price			$ 12.55	$ 12.5
Stock Issued During Period Shares New Issues			3,680,000	2,070,000
Stock Issued During Period, Value, New Issues			43,989,000	24,174,000
At the Market Offering Program [Member]
Share Price	$ 13.07	$ 13.14				$ 13.14		$ 13.07
Stock Issued During Period Shares New Issues	115,921	537,499
Stock Issued During Period, Value, New Issues	1,483,000	6,914,000
Value of Common Stock Available to be issued under At The Money Program		$ 27,900,000				$ 27,900,000