Capital and Financing Transactions - Interest Rate Swaps (Details) (USD $)		0 Months Ended		0 Months Ended		0 Months Ended		9 Months Ended	0 Months Ended		0 Months Ended
	Jun. 12, 2013 Cash Flow Hedging Designated as Hedging Instrument Interest Rate Swap, 1.6%	Apr. 01, 2014 Cash Flow Hedging Designated as Hedging Instrument Interest Rate Swap, 0.7%	Apr. 01, 2014 Cash Flow Hedging Designated as Hedging Instrument Interest Rate Swap, 0.7% Swap	Apr. 01, 2014 Cash Flow Hedging Designated as Hedging Instrument Interest Rate Swap, 1.7%	Apr. 01, 2014 Cash Flow Hedging Designated as Hedging Instrument Interest Rate Swap, 1.7%	Apr. 01, 2014 Cash Flow Hedging Designated as Hedging Instrument Interest Rate Swap, 2.6%	Apr. 01, 2014 Cash Flow Hedging Designated as Hedging Instrument Interest Rate Swap, 2.6%	Sep. 30, 2014 $125.0 Million Five-Year Term Loan Unsecured Debt	Apr. 01, 2014 Seven-year Term Loan Unsecured Debt	Apr. 01, 2014 Seven-year Term Loan Unsecured Debt	Apr. 01, 2014 LIBOR Seven-year Term Loan Unsecured Debt	Apr. 01, 2014 LIBOR Minimum Seven-year Term Loan Unsecured Debt	Apr. 01, 2014 LIBOR Maximum Seven-year Term Loan Unsecured Debt
Derivative [Line Items]
Notional amount	$ 120,000,000		$ 125,000,000		$ 5,000,000		$ 100,000,000.0
Derivative fixed LIBOR rate	1.60%		0.70%		1.70%		2.60%
Number of interest rate swaps			2
Debt instrument face amount								$ 125,000,000
Term of debt instrument								5 years	7 years
Derivative variable reference rate		one-month LIBOR		one-month LIBOR		one-month LIBOR
Variable reference rate on debt											LIBOR
Basis spread on variable rate (in percent)												1.75%	2.30%
Interest rate during period on debt (in percent)											1.90%
Interest rate at period end (in percent)										4.46%