Fair Value Measurements and Interest Rate Swaps (Details) (USD $) | 3 Months Ended |
In Millions, unless otherwise specified | Mar. 31, 2014 |
Derivative [Line Items] | ' |
Interest rate swap agreements, termination date | 19-Oct-16 |
Interest Rate Swap 1 [Member] | ' |
Derivative [Line Items] | ' |
Interest rate swap agreement, effective date | 21-Nov-11 |
Interest rate swap agreement, notional amount | 25 |
Interest rate swap agreement, fixed interest rate | 1.19% |
Interest Rate Swap 2 [Member] | ' |
Derivative [Line Items] | ' |
Interest rate swap agreement, effective date | 21-Nov-11 |
Interest rate swap agreement, notional amount | 25 |
Interest rate swap agreement, fixed interest rate | 1.19% |
Interest Rate Swap 3 [Member] | ' |
Derivative [Line Items] | ' |
Interest rate swap agreement, effective date | 21-Dec-11 |
Interest rate swap agreement, notional amount | 50 |
Interest rate swap agreement, fixed interest rate | 1.10% |
Interest Rate Swap 4 [Member] | ' |
Derivative [Line Items] | ' |
Interest rate swap agreement, effective date | 17-Jan-12 |
Interest rate swap agreement, notional amount | 25 |
Interest rate swap agreement, fixed interest rate | 1.05% |
Interest Rate Swap 5 [Member] | ' |
Derivative [Line Items] | ' |
Interest rate swap agreement, effective date | 19-Jan-12 |
Interest rate swap agreement, notional amount | 25 |
Interest rate swap agreement, fixed interest rate | 0.99% |