Shareholders' Equity (Details) - Common Stock [Member] - $ / shares	3 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Mar. 31, 2016
Class of Stock [Line Items]
Issuance of common stock (in shares)	4,975	4,975	1,600
Per share price of shares issued (in dollars per share)			$ 525.00
Minimum [Member]
Class of Stock [Line Items]
Per share price of shares issued (in dollars per share)	$ 590.00	$ 590.00
Maximum [Member]
Class of Stock [Line Items]
Per share price of shares issued (in dollars per share)	$ 595.00	$ 595.00