|
Basis of presentation (Details) (Interest rate swap, USD $)
In Thousands, unless otherwise specified |
3 Months Ended |
|---|---|
|
Mar. 31, 2013
|
|
|
Interest rate swap
|
|
| Interim Consolidated Financial Information | |
| Fixed interest rate (as a percent) | 6.335% |
| Variable rate basis | LIBOR |
| Interest rate added to variable rate (as a percent) | 4.25% |
| LIBOR floor (as a percent) | 1.50% |
| Negative fair value included in accumulated other comprehensive loss, net of tax | $ (305) |
| Notional amount | $ 50,000 |
| X | ||||||||||
|
- Definition
Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The percentage points added to the reference rate to compute the variable rate on the interest rate derivative. No definition available.
|
| X | ||||||||||
|
- Definition
The reference rate for the variable rate of the interest rate derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. No definition available.
|
| X | ||||||||||
|
- Definition
Fixed interest rate related to the interest rate derivative. No definition available.
|
| X | ||||||||||
|
- Definition
Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|