Employee Benefit Plans (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Estimated transition obligation amortized from accumulated other comprehensive income into net public benefit cost over the next year	$ 0
Estimated actuarial loss amortized from accumulated other comprehensive income into net periodic benefit cost over the next year	5,138
Estimated prior service cost amortized from accumulated other comprehensive income into net periodic benefit cost over the next year	49
Weighted average discount rate used to determine net periodic benefit cost	4.00%	4.60%	5.60%
Rate of compensation increase to determine the net periodic benefit cost	4.00%	4.00%	4.00%
Expected long-term rate of return on plan assets	7.50%	7.75%	8.00%
Weighted average discount rates used to determine actuarial present value of the projected benefit obligation	5.00%	4.00%	4.60%
Defined contribution plans, employer contribution plans, employer contribution percentage, maximum	3.00%
Defined contribution plans, employer contribution percentage, for new hires, minimum	0.00%
Defined contribution plans, employer contribution percentage, for new hires, maximum	0.00%
Vested contribution after three years, percentage	100.00%
Defined contribution plans vesting period, years	3 years
Defined contribution plan employer contribution percentage for branch offices, minimum	7.10%
Defined contribution plan employer contribution percentage for branch offices, maximum	9.40%
Post-Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated transition obligation amortized from accumulated other comprehensive income into net public benefit cost over the next year	0
Estimated actuarial loss amortized from accumulated other comprehensive income into net periodic benefit cost over the next year	328
Estimated prior service cost amortized from accumulated other comprehensive income into net periodic benefit cost over the next year	$ 0
Weighted average discount rate used to determine net periodic benefit cost	4.00%	4.60%	5.60%
Weighted average discount rates used to determine actuarial present value of the projected benefit obligation	5.00%	4.00%	4.60%
Pre-Medicare Claims [Member]
Defined Benefit Plan Disclosure [Line Items]
Health inflation rate	7.50%
Health inflation rate decreased	4.50%
Post-Medicare Claims [Member]
Defined Benefit Plan Disclosure [Line Items]
Health inflation rate	6.30%
Health inflation rate decreased	4.50%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets consist of shares in investment trusts, percentage	77.00%
Target asset allocation percentage	70.00%
Fixed Maturities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets consist of shares in investment trusts, percentage	16.00%
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets consist of shares in investment trusts, percentage	7.00%
Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation percentage	30.00%