|
Interest Rate Swap (Details) (USD $)
In Thousands, unless otherwise specified |
1 Months Ended | 1 Months Ended | 1 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
|
Apr. 30, 2014
|
May 31, 2011
|
Jun. 30, 2014
|
Dec. 31, 2013
|
May 31, 2011
5.75% Senior Notes [Member]
|
Jun. 30, 2014
5.75% Senior Notes [Member]
|
Nov. 30, 2012
5.75% Senior Notes [Member]
|
Apr. 30, 2014
4.75% Percent Senior Notes [Member] [Member]
|
Jun. 30, 2014
4.75% Percent Senior Notes [Member] [Member]
|
|
| Derivative [Line Items] | |||||||||
| Derivative, Notional Amount | $ 300,000 | $ 250,000 | |||||||
| Debt Instrument, Maturity Date | Jun. 01, 2017 | May 15, 2022 | |||||||
| Derivative, Fixed Interest Rate | 4.75% | 5.75% | |||||||
| Derivative, Description of Variable Rate Basis | three month LIBOR plus 2.27% | three month LIBOR plus 3.50% | |||||||
| Senior notes, at par | 725,000 | 425,000 | 250,000 | 175,000 | 300,000 | ||||
| Variable rate of swap, percentage | 3.73% | 2.52% | |||||||
| Fair value of interest rate swap agreements | $ 9,506 | $ 9,576 | $ 8,935 | $ 571 | |||||