Employee Benefit Plans (Share-Based Compensation Expense and Related Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Income Tax Benefit	$ 2,704	$ 1,726	$ 936
Employee Stock Option [Member]
Compensation expense	3,426	2,621	1,497
Non-vested share award [Member]
Compensation expense	$ 3,918	$ 2,096	$ 1,012