Derivative Financial Instruments (Summary of Interest Rate Swaps) (Details)	6 Months Ended
	Jun. 30, 2016 USD ($)
1.398% Interest Rate Swap [Member]
Derivative [Line Items]
Trade Date	Apr. 16, 2013
Notional Amount	$ 250,000,000
Interest Rate Paid	1.398%
Coverage Period	November 2015 to March 2018
Risk Coverage	Term Loan A
1.231% Interest Rate Swap [Member]
Derivative [Line Items]
Trade Date	Apr. 01, 2016
Notional Amount	$ 200,000,000
Interest Rate Paid	1.231%
Coverage Period	April 2016 to March 2021
Risk Coverage	Term Loan A
1.756% Interest Rate Swap [Member]
Derivative [Line Items]
Trade Date	Apr. 01, 2016
Notional Amount	$ 100,000,000
Interest Rate Paid	1.756%
Coverage Period	April 2016 to March 2023
Risk Coverage	Term Loan B