JHP Acquisition (Source and Use of Funds) (Details) (USD $)					0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Feb. 20, 2014 JHP Group Holdings [Member]	Mar. 31, 2014 JHP Group Holdings [Member]	Feb. 20, 2014 JHP Group Holdings [Member]	Feb. 20, 2014 Senior Secured Term Loan [Member] JHP Group Holdings [Member]
Business Acquisition [Line Items]
Senior secured term loan								$ 395,000,000
Sponsor equity contribution					110,000,000
Company cash on hand	155,927,000	130,080,000	54,480,000	36,794,000			1,633,000
Cash purchase of equity							487,929,000
Transaction costs						12,350,000	12,350,000
Accrued interest on Company debt					6,354,000
Total source and use of funds					$ 506,633,000