|
Fair Value Measurements and Interest Rate Swaps (Details) (USD $)
In Millions, unless otherwise specified
|
9 Months Ended |
|
Sep. 30, 2012
|
| Derivative [Line Items] |
|
| Interest rate swap agreements, termination date |
Oct. 19,
2016 |
|
Interest Rate Swap 1 [Member]
|
|
| Derivative [Line Items] |
|
| Interest rate swap agreement, effective date |
Nov. 21,
2011 |
| Interest rate swap agreement, notional amount |
25.0 |
| Interest rate swap agreement, fixed interest rate |
1.185% |
|
Interest Rate Swap 2 [Member]
|
|
| Derivative [Line Items] |
|
| Interest rate swap agreement, effective date |
Nov. 21,
2011 |
| Interest rate swap agreement, notional amount |
25.0 |
| Interest rate swap agreement, fixed interest rate |
1.185% |
|
Interest Rate Swap 3 [Member]
|
|
| Derivative [Line Items] |
|
| Interest rate swap agreement, effective date |
Dec. 21,
2011 |
| Interest rate swap agreement, notional amount |
50.0 |
| Interest rate swap agreement, fixed interest rate |
1.10% |
|
Interest Rate Swap 4 [Member]
|
|
| Derivative [Line Items] |
|
| Interest rate swap agreement, effective date |
Jan. 17,
2012 |
| Interest rate swap agreement, notional amount |
25.0 |
| Interest rate swap agreement, fixed interest rate |
1.05% |
|
Interest Rate Swap 5 [Member]
|
|
| Derivative [Line Items] |
|
| Interest rate swap agreement, effective date |
Jan. 19,
2012 |
| Interest rate swap agreement, notional amount |
25.0 |
| Interest rate swap agreement, fixed interest rate |
0.99% |