Stock-Based Compensation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Restricted shares
Changes in unvested awards, shares
Balance at the beginning of the period (in shares)	100
Granted (in shares)	40
Vested or Exercised (in shares)	(17)
Balance at the end of the period (in shares)	123
Changes in awards, Wtd Avg Grant Price
Balance at the beginning of the period (in dollars per share)	$ 24.12
Granted (in dollars per share)	$ 24.28
Vested or Exercised (in dollars per share)	$ 36.69
Balance at the end of the period (in dollars per share)	$ 22.37
Restricted shares | Employees
Stock-based compensation
Vesting period	3 years
Option award
Stock-based compensation
Vesting period	4 years
Option share awards vest annually in increments (as a percent)	25.00%
Changes in option awards outstanding, Shares
Balance at the beginning of the period (in shares)	383
Granted (in shares)	70
Vested or Exercised (in shares)	(2)
Forfeited (in shares)	(5)
Balance at the end of the period (in shares)	446
Changes in option awards, Wtd Avg Ex. Price
Balance at the beginning of the period (in dollars per share)	$ 24.52
Granted (in dollars per share)	$ 24.28
Vested or Exercised (in dollars per share)	$ 19.40
Forfeited (in dollars per share)	$ 24.04
Balance at the end of the period (in dollars per share)	$ 24.51