Debt - Narrative (Details) (Line of Credit [Member], USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility Current Borrowing Capacity	$ 300,000,000
Line of Credit Facility Maximum Borrowing Capacity	400,000,000
Line Of Credit Maturity Date	Jun. 14, 2018
Line of Credit Facility, Covenant Terms	Access to this facility is dependent on meeting certain financial, acquisition and other covenants, but primarily depends on the Company’s consolidated leverage ratio calculation, which cannot exceed 3.50 to 1.
Line of Credit Facility, Covenant Compliance	At March 31, 2015 and December 31, 2014, the consolidated leverage ratio was below 1.0 to 1 and the Company was also in compliance with all of the facilities’ other covenants.
Line of Credit Facility, Amount Outstanding	$ 55,893,000	$ 58,421,000